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(x^2+2x+2)/(x+1)+(x^2+8x+20)/(x+4) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
 2              2               
x  + 2*x + 2   x  + 8*x + 20    
------------ + ------------- = 0
   x + 1           x + 4        
$$\frac{\left(x^{2} + 8 x\right) + 20}{x + 4} + \frac{\left(x^{2} + 2 x\right) + 2}{x + 1} = 0$$
Gráfica
Respuesta rápida [src]
                ______________                              /             ______________                         \
               /       ______                               |            /       ______                          |
              /  9   \/ 1641                                |    ___    /  9   \/ 1641                           |
           3 /   - + --------                               |  \/ 3 *3 /   - + --------              ___         |
       5   \/    8      36                 1                |        \/    8      36               \/ 3          |
x1 = - - - ------------------- + ---------------------- + I*|- ------------------------- - ----------------------|
       2            2                    ______________     |              2                       ______________|
                                        /       ______      |                                     /       ______ |
                                       /  9   \/ 1641       |                                    /  9   \/ 1641  |
                                 24*3 /   - + --------      |                              24*3 /   - + -------- |
                                    \/    8      36         \                                 \/    8      36    /
$$x_{1} = - \frac{5}{2} - \frac{\sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} + \frac{1}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} - \frac{\sqrt{3}}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}\right)$$
                ______________                              /           ______________                         \
               /       ______                               |          /       ______                          |
              /  9   \/ 1641                                |  ___    /  9   \/ 1641                           |
           3 /   - + --------                               |\/ 3 *3 /   - + --------              ___         |
       5   \/    8      36                 1                |      \/    8      36               \/ 3          |
x2 = - - - ------------------- + ---------------------- + I*|------------------------- + ----------------------|
       2            2                    ______________     |            2                       ______________|
                                        /       ______      |                                   /       ______ |
                                       /  9   \/ 1641       |                                  /  9   \/ 1641  |
                                 24*3 /   - + --------      |                            24*3 /   - + -------- |
                                    \/    8      36         \                               \/    8      36    /
$$x_{2} = - \frac{5}{2} - \frac{\sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} + \frac{1}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + i \left(\frac{\sqrt{3}}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + \frac{\sqrt{3} \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2}\right)$$
                ______________                         
               /       ______                          
       5      /  9   \/ 1641               1           
x3 = - - + 3 /   - + --------  - ----------------------
       2   \/    8      36               ______________
                                        /       ______ 
                                       /  9   \/ 1641  
                                 12*3 /   - + -------- 
                                    \/    8      36    
$$x_{3} = - \frac{5}{2} - \frac{1}{12 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}$$
x3 = -5/2 - 1/(12*(9/8 + sqrt(1641)/36)^(1/3)) + (9/8 + sqrt(1641)/36)^(1/3)
Suma y producto de raíces [src]
suma
           ______________                              /             ______________                         \              ______________                              /           ______________                         \                                                     
          /       ______                               |            /       ______                          |             /       ______                               |          /       ______                          |                                                     
         /  9   \/ 1641                                |    ___    /  9   \/ 1641                           |            /  9   \/ 1641                                |  ___    /  9   \/ 1641                           |              ______________                         
      3 /   - + --------                               |  \/ 3 *3 /   - + --------              ___         |         3 /   - + --------                               |\/ 3 *3 /   - + --------              ___         |             /       ______                          
  5   \/    8      36                 1                |        \/    8      36               \/ 3          |     5   \/    8      36                 1                |      \/    8      36               \/ 3          |     5      /  9   \/ 1641               1           
- - - ------------------- + ---------------------- + I*|- ------------------------- - ----------------------| + - - - ------------------- + ---------------------- + I*|------------------------- + ----------------------| + - - + 3 /   - + --------  - ----------------------
  2            2                    ______________     |              2                       ______________|     2            2                    ______________     |            2                       ______________|     2   \/    8      36               ______________
                                   /       ______      |                                     /       ______ |                                      /       ______      |                                   /       ______ |                                      /       ______ 
                                  /  9   \/ 1641       |                                    /  9   \/ 1641  |                                     /  9   \/ 1641       |                                  /  9   \/ 1641  |                                     /  9   \/ 1641  
                            24*3 /   - + --------      |                              24*3 /   - + -------- |                               24*3 /   - + --------      |                            24*3 /   - + -------- |                               12*3 /   - + -------- 
                               \/    8      36         \                                 \/    8      36    /                                  \/    8      36         \                               \/    8      36    /                                  \/    8      36    
$$\left(- \frac{5}{2} - \frac{1}{12 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}\right) + \left(\left(- \frac{5}{2} - \frac{\sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} + \frac{1}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} - \frac{\sqrt{3}}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}\right)\right) + \left(- \frac{5}{2} - \frac{\sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} + \frac{1}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + i \left(\frac{\sqrt{3}}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + \frac{\sqrt{3} \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2}\right)\right)\right)$$
=
         /           ______________                         \     /             ______________                         \
         |          /       ______                          |     |            /       ______                          |
         |  ___    /  9   \/ 1641                           |     |    ___    /  9   \/ 1641                           |
         |\/ 3 *3 /   - + --------              ___         |     |  \/ 3 *3 /   - + --------              ___         |
  15     |      \/    8      36               \/ 3          |     |        \/    8      36               \/ 3          |
- -- + I*|------------------------- + ----------------------| + I*|- ------------------------- - ----------------------|
  2      |            2                       ______________|     |              2                       ______________|
         |                                   /       ______ |     |                                     /       ______ |
         |                                  /  9   \/ 1641  |     |                                    /  9   \/ 1641  |
         |                            24*3 /   - + -------- |     |                              24*3 /   - + -------- |
         \                               \/    8      36    /     \                                 \/    8      36    /
$$- \frac{15}{2} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} - \frac{\sqrt{3}}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}\right) + i \left(\frac{\sqrt{3}}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + \frac{\sqrt{3} \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2}\right)$$
producto
/           ______________                              /             ______________                         \\ /           ______________                              /           ______________                         \\                                                     
|          /       ______                               |            /       ______                          || |          /       ______                               |          /       ______                          ||                                                     
|         /  9   \/ 1641                                |    ___    /  9   \/ 1641                           || |         /  9   \/ 1641                                |  ___    /  9   \/ 1641                           || /           ______________                         \
|      3 /   - + --------                               |  \/ 3 *3 /   - + --------              ___         || |      3 /   - + --------                               |\/ 3 *3 /   - + --------              ___         || |          /       ______                          |
|  5   \/    8      36                 1                |        \/    8      36               \/ 3          || |  5   \/    8      36                 1                |      \/    8      36               \/ 3          || |  5      /  9   \/ 1641               1           |
|- - - ------------------- + ---------------------- + I*|- ------------------------- - ----------------------||*|- - - ------------------- + ---------------------- + I*|------------------------- + ----------------------||*|- - + 3 /   - + --------  - ----------------------|
|  2            2                    ______________     |              2                       ______________|| |  2            2                    ______________     |            2                       ______________|| |  2   \/    8      36               ______________|
|                                   /       ______      |                                     /       ______ || |                                   /       ______      |                                   /       ______ || |                                   /       ______ |
|                                  /  9   \/ 1641       |                                    /  9   \/ 1641  || |                                  /  9   \/ 1641       |                                  /  9   \/ 1641  || |                                  /  9   \/ 1641  |
|                            24*3 /   - + --------      |                              24*3 /   - + -------- || |                            24*3 /   - + --------      |                            24*3 /   - + -------- || |                            12*3 /   - + -------- |
\                               \/    8      36         \                                 \/    8      36    // \                               \/    8      36         \                               \/    8      36    // \                               \/    8      36    /
$$\left(- \frac{5}{2} - \frac{\sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} + \frac{1}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + i \left(\frac{\sqrt{3}}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + \frac{\sqrt{3} \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2}\right)\right) \left(- \frac{5}{2} - \frac{\sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} + \frac{1}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + i \left(- \frac{\sqrt{3} \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}{2} - \frac{\sqrt{3}}{24 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}}\right)\right) \left(- \frac{5}{2} - \frac{1}{12 \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}} + \sqrt[3]{\frac{9}{8} + \frac{\sqrt{1641}}{36}}\right)$$
=
-14
$$-14$$
-14
Respuesta numérica [src]
x1 = -3.12341390343152 - 1.18993053787824*i
x2 = -3.12341390343152 + 1.18993053787824*i
x3 = -1.25317219313695
x3 = -1.25317219313695