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x^3-10x-1225x-8000=0 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
 3                           
x  - 10*x - 1225*x - 8000 = 0
$$\left(- 1225 x + \left(x^{3} - 10 x\right)\right) - 8000 = 0$$
Teorema de Cardano-Vieta
es ecuación cúbica reducida
$$p x^{2} + q x + v + x^{3} = 0$$
donde
$$p = \frac{b}{a}$$
$$p = 0$$
$$q = \frac{c}{a}$$
$$q = -1235$$
$$v = \frac{d}{a}$$
$$v = -8000$$
Fórmulas de Cardano-Vieta
$$x_{1} + x_{2} + x_{3} = - p$$
$$x_{1} x_{2} + x_{1} x_{3} + x_{2} x_{3} = q$$
$$x_{1} x_{2} x_{3} = v$$
$$x_{1} + x_{2} + x_{3} = 0$$
$$x_{1} x_{2} + x_{1} x_{3} + x_{2} x_{3} = -1235$$
$$x_{1} x_{2} x_{3} = -8000$$
Suma y producto de raíces [src]
suma
       /                       1                       \     /       /                       1                       \                                                                        \                                                                                  /                       1                       \     /       /                       1                       \                                                                        \                                                                                                                                              
1235*re|-----------------------------------------------|     |1235*im|-----------------------------------------------|               /    /  ___________\\               /    /  ___________\\|               /    /  ___________\\               /    /  ___________\\   1235*re|-----------------------------------------------|     |1235*im|-----------------------------------------------|               /    /  ___________\\               /    /  ___________\\|               /    /  ___________\\               /    /  ___________\\                                                                      
       |     __________________________                |     |       |     __________________________                |               |    |\/ 174198345 ||               |    |\/ 174198345 |||               |    |\/ 174198345 ||               |    |\/ 174198345 ||          |     __________________________                |     |       |     __________________________                |               |    |\/ 174198345 ||               |    |\/ 174198345 |||               |    |\/ 174198345 ||               |    |\/ 174198345 ||                                                                      
       |    /              ___________  /          ___\|     |       |    /              ___________  /          ___\|               |atan|-------------||               |atan|-------------|||               |atan|-------------||               |atan|-------------||          |    /              ___________  /          ___\|     |       |    /              ___________  /          ___\|               |atan|-------------||               |atan|-------------|||               |atan|-------------||               |atan|-------------||                                                                      
       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     ______    |    \     7200    /|     ______    |    \     7200    /||     ______    |    \     7200    /|     ______    |    \     7200    /|          |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     ______    |    \     7200    /|     ______    |    \     7200    /||     ______    |    \     7200    /|     ______    |    \     7200    /|        __________________________                                    
       |3 /   4000 + ----------------- *|- - - -------||     |       |3 /   4000 + ----------------- *|- - - -------||   \/ 1235 *cos|-------------------|   \/ 3705 *sin|-------------------||   \/ 1235 *sin|-------------------|   \/ 3705 *cos|-------------------|          |3 /   4000 + ----------------- *|- - + -------||     |       |3 /   4000 + ----------------- *|- - + -------||   \/ 1235 *cos|-------------------|   \/ 3705 *sin|-------------------||   \/ 1235 *sin|-------------------|   \/ 3705 *cos|-------------------|       /              ___________                                     
       \\/                   9          \  2      2   //     |       \\/                   9          \  2      2   //               \         3         /               \         3         /|               \         3         /               \         3         /          \\/                   9          \  2      2   //     |       \\/                   9          \  2      2   //               \         3         /               \         3         /|               \         3         /               \         3         /      /         5*I*\/ 174198345                    1235              
-------------------------------------------------------- + I*|-------------------------------------------------------- - --------------------------------- - ---------------------------------| + --------------------------------- - --------------------------------- + -------------------------------------------------------- + I*|-------------------------------------------------------- + --------------------------------- - ---------------------------------| - --------------------------------- - --------------------------------- + 3 /   4000 + -----------------  + ---------------------------------
                           3                                 \                           3                                               2                                   6                /                   2                                   6                                              3                                 \                           3                                               2                                   6                /                   2                                   6                   \/                   9                   __________________________
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            /              ___________ 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           /         5*I*\/ 174198345  
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      3*3 /   4000 + ----------------- 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        \/                   9         
$$\left(\frac{1235}{3 \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}} + \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}\right) + \left(\left(\frac{1235 \operatorname{re}{\left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} - \frac{\sqrt{3705} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} - \frac{\sqrt{1235} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} + i \left(\frac{1235 \operatorname{im}{\left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} - \frac{\sqrt{3705} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{\sqrt{1235} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2}\right)\right) + \left(- \frac{\sqrt{3705} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{1235 \operatorname{re}{\left(\frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} + \frac{\sqrt{1235} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} + i \left(- \frac{\sqrt{1235} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} - \frac{\sqrt{3705} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{1235 \operatorname{im}{\left(\frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3}\right)\right)\right)$$
=
                                                                             /                       1                       \          /                       1                       \     /       /                       1                       \                                                                        \     /       /                       1                       \                                                                        \                                    
                                                                      1235*re|-----------------------------------------------|   1235*re|-----------------------------------------------|     |1235*im|-----------------------------------------------|               /    /  ___________\\               /    /  ___________\\|     |1235*im|-----------------------------------------------|               /    /  ___________\\               /    /  ___________\\|               /    /  ___________\\
                                                                             |     __________________________                |          |     __________________________                |     |       |     __________________________                |               |    |\/ 174198345 ||               |    |\/ 174198345 |||     |       |     __________________________                |               |    |\/ 174198345 ||               |    |\/ 174198345 |||               |    |\/ 174198345 ||
                                                                             |    /              ___________  /          ___\|          |    /              ___________  /          ___\|     |       |    /              ___________  /          ___\|               |atan|-------------||               |atan|-------------|||     |       |    /              ___________  /          ___\|               |atan|-------------||               |atan|-------------|||               |atan|-------------||
     __________________________                                              |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||          |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     ______    |    \     7200    /|     ______    |    \     7200    /||     |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     ______    |    \     7200    /|     ______    |    \     7200    /||     ______    |    \     7200    /|
    /              ___________                                               |3 /   4000 + ----------------- *|- - + -------||          |3 /   4000 + ----------------- *|- - - -------||     |       |3 /   4000 + ----------------- *|- - + -------||   \/ 1235 *cos|-------------------|   \/ 3705 *sin|-------------------||     |       |3 /   4000 + ----------------- *|- - - -------||   \/ 1235 *cos|-------------------|   \/ 3705 *sin|-------------------||   \/ 3705 *cos|-------------------|
   /         5*I*\/ 174198345                    1235                        \\/                   9          \  2      2   //          \\/                   9          \  2      2   //     |       \\/                   9          \  2      2   //               \         3         /               \         3         /|     |       \\/                   9          \  2      2   //               \         3         /               \         3         /|               \         3         /
3 /   4000 + -----------------  + --------------------------------- + -------------------------------------------------------- + -------------------------------------------------------- + I*|-------------------------------------------------------- + --------------------------------- - ---------------------------------| + I*|-------------------------------------------------------- - --------------------------------- - ---------------------------------| - ---------------------------------
\/                   9                   __________________________                              3                                                          3                                 \                           3                                               2                                   6                /     \                           3                                               2                                   6                /                   3                
                                        /              ___________                                                                                                                                                                                                                                                                                                                                                                                                                                         
                                       /         5*I*\/ 174198345                                                                                                                                                                                                                                                                                                                                                                                                                                          
                                  3*3 /   4000 + -----------------                                                                                                                                                                                                                                                                                                                                                                                                                                         
                                    \/                   9                                                                                                                                                                                                                                                                                                                                                                                                                                                 
$$- \frac{\sqrt{3705} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{3} + \frac{1235 \operatorname{re}{\left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} + \frac{1235 \operatorname{re}{\left(\frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} + \frac{1235}{3 \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}} + i \left(\frac{1235 \operatorname{im}{\left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} - \frac{\sqrt{3705} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{\sqrt{1235} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2}\right) + i \left(- \frac{\sqrt{1235} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} - \frac{\sqrt{3705} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{1235 \operatorname{im}{\left(\frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3}\right) + \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}$$
producto
/       /                       1                       \     /       /                       1                       \                                                                        \                                                                        \ /       /                       1                       \     /       /                       1                       \                                                                        \                                                                        \                                                                      
|1235*re|-----------------------------------------------|     |1235*im|-----------------------------------------------|               /    /  ___________\\               /    /  ___________\\|               /    /  ___________\\               /    /  ___________\\| |1235*re|-----------------------------------------------|     |1235*im|-----------------------------------------------|               /    /  ___________\\               /    /  ___________\\|               /    /  ___________\\               /    /  ___________\\|                                                                      
|       |     __________________________                |     |       |     __________________________                |               |    |\/ 174198345 ||               |    |\/ 174198345 |||               |    |\/ 174198345 ||               |    |\/ 174198345 ||| |       |     __________________________                |     |       |     __________________________                |               |    |\/ 174198345 ||               |    |\/ 174198345 |||               |    |\/ 174198345 ||               |    |\/ 174198345 |||                                                                      
|       |    /              ___________  /          ___\|     |       |    /              ___________  /          ___\|               |atan|-------------||               |atan|-------------|||               |atan|-------------||               |atan|-------------||| |       |    /              ___________  /          ___\|     |       |    /              ___________  /          ___\|               |atan|-------------||               |atan|-------------|||               |atan|-------------||               |atan|-------------|||                                                                      
|       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     ______    |    \     7200    /|     ______    |    \     7200    /||     ______    |    \     7200    /|     ______    |    \     7200    /|| |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     ______    |    \     7200    /|     ______    |    \     7200    /||     ______    |    \     7200    /|     ______    |    \     7200    /|| /     __________________________                                    \
|       |3 /   4000 + ----------------- *|- - - -------||     |       |3 /   4000 + ----------------- *|- - - -------||   \/ 1235 *cos|-------------------|   \/ 3705 *sin|-------------------||   \/ 1235 *sin|-------------------|   \/ 3705 *cos|-------------------|| |       |3 /   4000 + ----------------- *|- - + -------||     |       |3 /   4000 + ----------------- *|- - + -------||   \/ 1235 *cos|-------------------|   \/ 3705 *sin|-------------------||   \/ 1235 *sin|-------------------|   \/ 3705 *cos|-------------------|| |    /              ___________                                     |
|       \\/                   9          \  2      2   //     |       \\/                   9          \  2      2   //               \         3         /               \         3         /|               \         3         /               \         3         /| |       \\/                   9          \  2      2   //     |       \\/                   9          \  2      2   //               \         3         /               \         3         /|               \         3         /               \         3         /| |   /         5*I*\/ 174198345                    1235              |
|-------------------------------------------------------- + I*|-------------------------------------------------------- - --------------------------------- - ---------------------------------| + --------------------------------- - ---------------------------------|*|-------------------------------------------------------- + I*|-------------------------------------------------------- + --------------------------------- - ---------------------------------| - --------------------------------- - ---------------------------------|*|3 /   4000 + -----------------  + ---------------------------------|
\                           3                                 \                           3                                               2                                   6                /                   2                                   6                / \                           3                                 \                           3                                               2                                   6                /                   2                                   6                / |\/                   9                   __________________________|
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                        /              ___________ |
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                       /         5*I*\/ 174198345  |
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                  3*3 /   4000 + ----------------- |
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    \                                    \/                   9         /
$$\left(- \frac{\sqrt{3705} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{1235 \operatorname{re}{\left(\frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} + \frac{\sqrt{1235} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} + i \left(- \frac{\sqrt{1235} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} - \frac{\sqrt{3705} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{1235 \operatorname{im}{\left(\frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3}\right)\right) \left(\frac{1235 \operatorname{re}{\left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} - \frac{\sqrt{3705} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} - \frac{\sqrt{1235} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} + i \left(\frac{1235 \operatorname{im}{\left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} - \frac{\sqrt{3705} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{\sqrt{1235} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2}\right)\right) \left(\frac{1235}{3 \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}} + \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}\right)$$
=
               /         /      /  ___________\\\                                              
               |         |      |\/ 174198345 |||                                              
               |         |2*atan|-------------|||                                              
               |         |      \     7200    /||                                              
               |      cos|---------------------|| /                           2/3             \
    3 ___  2/3 |  1      \          3          /| |/              ___________\           3 ___|
988*\/ 3 *5   *|- - + --------------------------|*\\36000 + 5*I*\/ 174198345 /    + 1235*\/ 3 /
               \  4               2             /                                              
-----------------------------------------------------------------------------------------------
                                      ________________________                                 
                                   3 /            ___________                                  
                                 9*\/  7200 + I*\/ 174198345                                   
$$\frac{988 \sqrt[3]{3} \cdot 5^{\frac{2}{3}} \left(- \frac{1}{4} + \frac{\cos{\left(\frac{2 \operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2}\right) \left(1235 \sqrt[3]{3} + \left(36000 + 5 \sqrt{174198345} i\right)^{\frac{2}{3}}\right)}{9 \sqrt[3]{7200 + \sqrt{174198345} i}}$$
988*3^(1/3)*5^(2/3)*(-1/4 + cos(2*atan(sqrt(174198345)/7200)/3)/2)*((36000 + 5*i*sqrt(174198345))^(2/3) + 1235*3^(1/3))/(9*(7200 + i*sqrt(174198345))^(1/3))
Respuesta rápida [src]
            /                       1                       \     /       /                       1                       \                                                                        \                                                                        
     1235*re|-----------------------------------------------|     |1235*im|-----------------------------------------------|               /    /  ___________\\               /    /  ___________\\|               /    /  ___________\\               /    /  ___________\\
            |     __________________________                |     |       |     __________________________                |               |    |\/ 174198345 ||               |    |\/ 174198345 |||               |    |\/ 174198345 ||               |    |\/ 174198345 ||
            |    /              ___________  /          ___\|     |       |    /              ___________  /          ___\|               |atan|-------------||               |atan|-------------|||               |atan|-------------||               |atan|-------------||
            |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     ______    |    \     7200    /|     ______    |    \     7200    /||     ______    |    \     7200    /|     ______    |    \     7200    /|
            |3 /   4000 + ----------------- *|- - - -------||     |       |3 /   4000 + ----------------- *|- - - -------||   \/ 1235 *cos|-------------------|   \/ 3705 *sin|-------------------||   \/ 1235 *sin|-------------------|   \/ 3705 *cos|-------------------|
            \\/                   9          \  2      2   //     |       \\/                   9          \  2      2   //               \         3         /               \         3         /|               \         3         /               \         3         /
x1 = -------------------------------------------------------- + I*|-------------------------------------------------------- - --------------------------------- - ---------------------------------| + --------------------------------- - ---------------------------------
                                3                                 \                           3                                               2                                   6                /                   2                                   6                
$$x_{1} = - \frac{\sqrt{3705} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{1235 \operatorname{re}{\left(\frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} + \frac{\sqrt{1235} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} + i \left(- \frac{\sqrt{1235} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} - \frac{\sqrt{3705} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{1235 \operatorname{im}{\left(\frac{1}{\left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3}\right)$$
            /                       1                       \     /       /                       1                       \                                                                        \                                                                        
     1235*re|-----------------------------------------------|     |1235*im|-----------------------------------------------|               /    /  ___________\\               /    /  ___________\\|               /    /  ___________\\               /    /  ___________\\
            |     __________________________                |     |       |     __________________________                |               |    |\/ 174198345 ||               |    |\/ 174198345 |||               |    |\/ 174198345 ||               |    |\/ 174198345 ||
            |    /              ___________  /          ___\|     |       |    /              ___________  /          ___\|               |atan|-------------||               |atan|-------------|||               |atan|-------------||               |atan|-------------||
            |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     |       |   /         5*I*\/ 174198345   |  1   I*\/ 3 ||     ______    |    \     7200    /|     ______    |    \     7200    /||     ______    |    \     7200    /|     ______    |    \     7200    /|
            |3 /   4000 + ----------------- *|- - + -------||     |       |3 /   4000 + ----------------- *|- - + -------||   \/ 1235 *cos|-------------------|   \/ 3705 *sin|-------------------||   \/ 1235 *sin|-------------------|   \/ 3705 *cos|-------------------|
            \\/                   9          \  2      2   //     |       \\/                   9          \  2      2   //               \         3         /               \         3         /|               \         3         /               \         3         /
x2 = -------------------------------------------------------- + I*|-------------------------------------------------------- + --------------------------------- - ---------------------------------| - --------------------------------- - ---------------------------------
                                3                                 \                           3                                               2                                   6                /                   2                                   6                
$$x_{2} = \frac{1235 \operatorname{re}{\left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} - \frac{\sqrt{3705} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} - \frac{\sqrt{1235} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2} + i \left(\frac{1235 \operatorname{im}{\left(\frac{1}{\left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}}\right)}}{3} - \frac{\sqrt{3705} \sin{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{6} + \frac{\sqrt{1235} \cos{\left(\frac{\operatorname{atan}{\left(\frac{\sqrt{174198345}}{7200} \right)}}{3} \right)}}{2}\right)$$
          __________________________                                    
         /              ___________                                     
        /         5*I*\/ 174198345                    1235              
x3 = 3 /   4000 + -----------------  + ---------------------------------
     \/                   9                   __________________________
                                             /              ___________ 
                                            /         5*I*\/ 174198345  
                                       3*3 /   4000 + ----------------- 
                                         \/                   9         
$$x_{3} = \frac{1235}{3 \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}} + \sqrt[3]{4000 + \frac{5 \sqrt{174198345} i}{9}}$$
x3 = 1235/(3*(4000 + 5*sqrt(174198345)*i/9)^(1/3)) + (4000 + 5*sqrt(174198345)*i/9)^(1/3)
Respuesta numérica [src]
x1 = -31.2948361841325
x2 = -6.72387872229458 + 2.16840434497101e-19*i
x3 = 38.0187149064271
x3 = 38.0187149064271