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(x+5)*(x-2)+3*sqrt(x+3)=0 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
                      _______    
(x + 5)*(x - 2) + 3*\/ x + 3  = 0
$$\left(x - 2\right) \left(x + 5\right) + 3 \sqrt{x + 3} = 0$$
Gráfica
Respuesta rápida [src]
x1 = 1
$$x_{1} = 1$$
                                            _________________     /             _________________                            \
                                           /          ______      |            /          ______                             |
                                          /  1033   \/ 1965       |    ___    /  1033   \/ 1965                              |
                                       3 /   ---- + --------      |  \/ 3 *3 /   ---- + --------                  ___        |
       7               61              \/     54       6          |        \/     54       6                 61*\/ 3         |
x2 = - - - ------------------------- - ---------------------- + I*|- ---------------------------- + -------------------------|
       3           _________________             2                |               2                         _________________|
                  /          ______                               |                                        /          ______ |
                 /  1033   \/ 1965                                |                                       /  1033   \/ 1965  |
           18*3 /   ---- + --------                               |                                 18*3 /   ---- + -------- |
              \/     54       6                                   \                                    \/     54       6     /
$$x_{2} = - \frac{7}{3} - \frac{\sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} - \frac{61}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} + \frac{61 \sqrt{3}}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}\right)$$
                                            _________________     /           _________________                            \
                                           /          ______      |          /          ______                             |
                                          /  1033   \/ 1965       |  ___    /  1033   \/ 1965                              |
                                       3 /   ---- + --------      |\/ 3 *3 /   ---- + --------                  ___        |
       7               61              \/     54       6          |      \/     54       6                 61*\/ 3         |
x3 = - - - ------------------------- - ---------------------- + I*|---------------------------- - -------------------------|
       3           _________________             2                |             2                         _________________|
                  /          ______                               |                                      /          ______ |
                 /  1033   \/ 1965                                |                                     /  1033   \/ 1965  |
           18*3 /   ---- + --------                               |                               18*3 /   ---- + -------- |
              \/     54       6                                   \                                  \/     54       6     /
$$x_{3} = - \frac{7}{3} - \frac{\sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} - \frac{61}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + i \left(- \frac{61 \sqrt{3}}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2}\right)$$
x3 = -7/3 - (sqrt(1965)/6 + 1033/54)^(1/3)/2 - 61/(18*(sqrt(1965)/6 + 1033/54)^(1/3)) + i*(-61*sqrt(3)/(18*(sqrt(1965)/6 + 1033/54)^(1/3)) + sqrt(3)*(sqrt(1965)/6 + 1033/54)^(1/3)/2)
Suma y producto de raíces [src]
suma
                                           _________________     /             _________________                            \                                          _________________     /           _________________                            \
                                          /          ______      |            /          ______                             |                                         /          ______      |          /          ______                             |
                                         /  1033   \/ 1965       |    ___    /  1033   \/ 1965                              |                                        /  1033   \/ 1965       |  ___    /  1033   \/ 1965                              |
                                      3 /   ---- + --------      |  \/ 3 *3 /   ---- + --------                  ___        |                                     3 /   ---- + --------      |\/ 3 *3 /   ---- + --------                  ___        |
      7               61              \/     54       6          |        \/     54       6                 61*\/ 3         |     7               61              \/     54       6          |      \/     54       6                 61*\/ 3         |
1 + - - - ------------------------- - ---------------------- + I*|- ---------------------------- + -------------------------| + - - - ------------------------- - ---------------------- + I*|---------------------------- - -------------------------|
      3           _________________             2                |               2                         _________________|     3           _________________             2                |             2                         _________________|
                 /          ______                               |                                        /          ______ |                /          ______                               |                                      /          ______ |
                /  1033   \/ 1965                                |                                       /  1033   \/ 1965  |               /  1033   \/ 1965                                |                                     /  1033   \/ 1965  |
          18*3 /   ---- + --------                               |                                 18*3 /   ---- + -------- |         18*3 /   ---- + --------                               |                               18*3 /   ---- + -------- |
             \/     54       6                                   \                                    \/     54       6     /            \/     54       6                                   \                                  \/     54       6     /
$$\left(1 + \left(- \frac{7}{3} - \frac{\sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} - \frac{61}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} + \frac{61 \sqrt{3}}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}\right)\right)\right) + \left(- \frac{7}{3} - \frac{\sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} - \frac{61}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + i \left(- \frac{61 \sqrt{3}}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2}\right)\right)$$
=
                                                             /           _________________                            \     /             _________________                            \
                                                             |          /          ______                             |     |            /          ______                             |
            _________________                                |  ___    /  1033   \/ 1965                              |     |    ___    /  1033   \/ 1965                              |
           /          ______                                 |\/ 3 *3 /   ---- + --------                  ___        |     |  \/ 3 *3 /   ---- + --------                  ___        |
  11      /  1033   \/ 1965                61                |      \/     54       6                 61*\/ 3         |     |        \/     54       6                 61*\/ 3         |
- -- - 3 /   ---- + --------  - ------------------------ + I*|---------------------------- - -------------------------| + I*|- ---------------------------- + -------------------------|
  3    \/     54       6               _________________     |             2                         _________________|     |               2                         _________________|
                                      /          ______      |                                      /          ______ |     |                                        /          ______ |
                                     /  1033   \/ 1965       |                                     /  1033   \/ 1965  |     |                                       /  1033   \/ 1965  |
                                9*3 /   ---- + --------      |                               18*3 /   ---- + -------- |     |                                 18*3 /   ---- + -------- |
                                  \/     54       6          \                                  \/     54       6     /     \                                    \/     54       6     /
$$- \frac{11}{3} - \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}} - \frac{61}{9 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} + \frac{61 \sqrt{3}}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}\right) + i \left(- \frac{61 \sqrt{3}}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2}\right)$$
producto
/                                       _________________     /             _________________                            \\ /                                       _________________     /           _________________                            \\
|                                      /          ______      |            /          ______                             || |                                      /          ______      |          /          ______                             ||
|                                     /  1033   \/ 1965       |    ___    /  1033   \/ 1965                              || |                                     /  1033   \/ 1965       |  ___    /  1033   \/ 1965                              ||
|                                  3 /   ---- + --------      |  \/ 3 *3 /   ---- + --------                  ___        || |                                  3 /   ---- + --------      |\/ 3 *3 /   ---- + --------                  ___        ||
|  7               61              \/     54       6          |        \/     54       6                 61*\/ 3         || |  7               61              \/     54       6          |      \/     54       6                 61*\/ 3         ||
|- - - ------------------------- - ---------------------- + I*|- ---------------------------- + -------------------------||*|- - - ------------------------- - ---------------------- + I*|---------------------------- - -------------------------||
|  3           _________________             2                |               2                         _________________|| |  3           _________________             2                |             2                         _________________||
|             /          ______                               |                                        /          ______ || |             /          ______                               |                                      /          ______ ||
|            /  1033   \/ 1965                                |                                       /  1033   \/ 1965  || |            /  1033   \/ 1965                                |                                     /  1033   \/ 1965  ||
|      18*3 /   ---- + --------                               |                                 18*3 /   ---- + -------- || |      18*3 /   ---- + --------                               |                               18*3 /   ---- + -------- ||
\         \/     54       6                                   \                                    \/     54       6     // \         \/     54       6                                   \                                  \/     54       6     //
$$\left(- \frac{7}{3} - \frac{\sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} - \frac{61}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + i \left(- \frac{61 \sqrt{3}}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2}\right)\right) \left(- \frac{7}{3} - \frac{\sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} - \frac{61}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}{2} + \frac{61 \sqrt{3}}{18 \sqrt[3]{\frac{\sqrt{1965}}{6} + \frac{1033}{54}}}\right)\right)$$
=
                       2/3          ____________________                           ____________________                  
    /           ______\          3 /             ______          2/3     ______ 3 /             ______       2/3   ______
  4*\1033 + 9*\/ 1965 /      629*\/  2066 + 18*\/ 1965     4891*2      \/ 1965 *\/  2066 + 18*\/ 1965     7*2   *\/ 1965 
- ------------------------ + --------------------------- + --------- + -------------------------------- + ---------------
             3                            6                    6                      2                          2       
-------------------------------------------------------------------------------------------------------------------------
                                                                     2/3                                                 
                                                  /           ______\                                                    
                                                  \1033 + 9*\/ 1965 /                                                    
$$\frac{- \frac{4 \left(9 \sqrt{1965} + 1033\right)^{\frac{2}{3}}}{3} + \frac{7 \sqrt{1965} \cdot 2^{\frac{2}{3}}}{2} + \frac{\sqrt{1965} \sqrt[3]{18 \sqrt{1965} + 2066}}{2} + \frac{4891 \cdot 2^{\frac{2}{3}}}{6} + \frac{629 \sqrt[3]{18 \sqrt{1965} + 2066}}{6}}{\left(9 \sqrt{1965} + 1033\right)^{\frac{2}{3}}}$$
(-4*(1033 + 9*sqrt(1965))^(2/3)/3 + 629*(2066 + 18*sqrt(1965))^(1/3)/6 + 4891*2^(2/3)/6 + sqrt(1965)*(2066 + 18*sqrt(1965))^(1/3)/2 + 7*2^(2/3)*sqrt(1965)/2)/(1033 + 9*sqrt(1965))^(2/3)
Respuesta numérica [src]
x1 = 1.0
x2 = -4.96078509762886 - 0.614145738213459*i
x3 = -4.96078509762886 + 0.614145738213459*i
x3 = -4.96078509762886 + 0.614145738213459*i