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sqrt(x^2+7x-8)+sqrt(x^2-1)=a*(sqrt(x-1)) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
   ______________      ________              
  /  2                /  2            _______
\/  x  + 7*x - 8  + \/  x  - 1  = a*\/ x - 1 
$$\sqrt{x^{2} - 1} + \sqrt{\left(x^{2} + 7 x\right) - 8} = a \sqrt{x - 1}$$
Gráfica
Suma y producto de raíces [src]
suma
      //           2                      2          \                                                       /       4        4           2           2          2      2   \            \   /           2                      2          \                                                                    /                      3                3         \            
      ||         im (a)                 re (a)       | /                      3                3         \   \49 + im (a) + re (a) - 18*re (a) + 18*im (a) - 6*im (a)*re (a)/*im(a)*re(a)|   |         im (a)                 re (a)       | /       4        4           2           2          2      2   \   \-36*im(a)*re(a) - 4*im (a)*re(a) + 4*re (a)*im(a)/*im(a)*re(a)
1 + I*||- -------------------- + --------------------|*\-36*im(a)*re(a) - 4*im (a)*re(a) + 4*re (a)*im(a)/ - ----------------------------------------------------------------------------| + |- -------------------- + --------------------|*\49 + im (a) + re (a) - 18*re (a) + 18*im (a) - 6*im (a)*re (a)/ + ---------------------------------------------------------------
      ||                     2                      2|                                                                                                      2                            |   |                     2                      2|                                                                                                             2                     
      ||    /  2        2   \      /  2        2   \ |                                                                                     /  2        2   \                             |   |    /  2        2   \      /  2        2   \ |                                                                                            /  2        2   \                      
      \\  4*\im (a) + re (a)/    4*\im (a) + re (a)/ /                                                                                   2*\im (a) + re (a)/                             /   \  4*\im (a) + re (a)/    4*\im (a) + re (a)/ /                                                                                          2*\im (a) + re (a)/                      
$$\left(i \left(\left(\frac{\left(\operatorname{re}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}} - \frac{\left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) \left(4 \left(\operatorname{re}{\left(a\right)}\right)^{3} \operatorname{im}{\left(a\right)} - 4 \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{3} - 36 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}\right) - \frac{\left(\left(\operatorname{re}{\left(a\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4} + 18 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49\right) \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}}{2 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) + \left(\frac{\left(\operatorname{re}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}} - \frac{\left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) \left(\left(\operatorname{re}{\left(a\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4} + 18 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49\right) + \frac{\left(4 \left(\operatorname{re}{\left(a\right)}\right)^{3} \operatorname{im}{\left(a\right)} - 4 \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{3} - 36 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}\right) \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}}{2 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) + 1$$
=
      //           2                      2          \                                                       /       4        4           2           2          2      2   \            \   /           2                      2          \                                                                    /                      3                3         \            
      ||         im (a)                 re (a)       | /                      3                3         \   \49 + im (a) + re (a) - 18*re (a) + 18*im (a) - 6*im (a)*re (a)/*im(a)*re(a)|   |         im (a)                 re (a)       | /       4        4           2           2          2      2   \   \-36*im(a)*re(a) - 4*im (a)*re(a) + 4*re (a)*im(a)/*im(a)*re(a)
1 + I*||- -------------------- + --------------------|*\-36*im(a)*re(a) - 4*im (a)*re(a) + 4*re (a)*im(a)/ - ----------------------------------------------------------------------------| + |- -------------------- + --------------------|*\49 + im (a) + re (a) - 18*re (a) + 18*im (a) - 6*im (a)*re (a)/ + ---------------------------------------------------------------
      ||                     2                      2|                                                                                                      2                            |   |                     2                      2|                                                                                                             2                     
      ||    /  2        2   \      /  2        2   \ |                                                                                     /  2        2   \                             |   |    /  2        2   \      /  2        2   \ |                                                                                            /  2        2   \                      
      \\  4*\im (a) + re (a)/    4*\im (a) + re (a)/ /                                                                                   2*\im (a) + re (a)/                             /   \  4*\im (a) + re (a)/    4*\im (a) + re (a)/ /                                                                                          2*\im (a) + re (a)/                      
$$i \left(\left(\frac{\left(\operatorname{re}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}} - \frac{\left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) \left(4 \left(\operatorname{re}{\left(a\right)}\right)^{3} \operatorname{im}{\left(a\right)} - 4 \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{3} - 36 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}\right) - \frac{\left(\left(\operatorname{re}{\left(a\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4} + 18 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49\right) \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}}{2 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) + \left(\frac{\left(\operatorname{re}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}} - \frac{\left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) \left(\left(\operatorname{re}{\left(a\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4} + 18 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49\right) + 1 + \frac{\left(4 \left(\operatorname{re}{\left(a\right)}\right)^{3} \operatorname{im}{\left(a\right)} - 4 \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{3} - 36 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}\right) \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}}{2 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}$$
producto
  //           2                      2          \                                                       /       4        4           2           2          2      2   \            \   /           2                      2          \                                                                    /                      3                3         \            
  ||         im (a)                 re (a)       | /                      3                3         \   \49 + im (a) + re (a) - 18*re (a) + 18*im (a) - 6*im (a)*re (a)/*im(a)*re(a)|   |         im (a)                 re (a)       | /       4        4           2           2          2      2   \   \-36*im(a)*re(a) - 4*im (a)*re(a) + 4*re (a)*im(a)/*im(a)*re(a)
I*||- -------------------- + --------------------|*\-36*im(a)*re(a) - 4*im (a)*re(a) + 4*re (a)*im(a)/ - ----------------------------------------------------------------------------| + |- -------------------- + --------------------|*\49 + im (a) + re (a) - 18*re (a) + 18*im (a) - 6*im (a)*re (a)/ + ---------------------------------------------------------------
  ||                     2                      2|                                                                                                      2                            |   |                     2                      2|                                                                                                             2                     
  ||    /  2        2   \      /  2        2   \ |                                                                                     /  2        2   \                             |   |    /  2        2   \      /  2        2   \ |                                                                                            /  2        2   \                      
  \\  4*\im (a) + re (a)/    4*\im (a) + re (a)/ /                                                                                   2*\im (a) + re (a)/                             /   \  4*\im (a) + re (a)/    4*\im (a) + re (a)/ /                                                                                          2*\im (a) + re (a)/                      
$$i \left(\left(\frac{\left(\operatorname{re}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}} - \frac{\left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) \left(4 \left(\operatorname{re}{\left(a\right)}\right)^{3} \operatorname{im}{\left(a\right)} - 4 \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{3} - 36 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}\right) - \frac{\left(\left(\operatorname{re}{\left(a\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4} + 18 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49\right) \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}}{2 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) + \left(\frac{\left(\operatorname{re}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}} - \frac{\left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) \left(\left(\operatorname{re}{\left(a\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4} + 18 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49\right) + \frac{\left(4 \left(\operatorname{re}{\left(a\right)}\right)^{3} \operatorname{im}{\left(a\right)} - 4 \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{3} - 36 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}\right) \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}}{2 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}$$
=
  6        6           2           4           4           2        2      4        4      2           2      2                               5                  5                  3      3   
re (a) - im (a) - 49*im (a) - 18*im (a) - 18*re (a) + 49*re (a) + im (a)*re (a) - im (a)*re (a) - 36*im (a)*re (a) - 98*I*im(a)*re(a) + 2*I*im (a)*re(a) + 2*I*re (a)*im(a) + 4*I*im (a)*re (a)
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                               /  4        4          2      2   \                                                                             
                                                                             4*\im (a) + re (a) + 2*im (a)*re (a)/                                                                             
$$\frac{\left(\operatorname{re}{\left(a\right)}\right)^{6} + 2 i \left(\operatorname{re}{\left(a\right)}\right)^{5} \operatorname{im}{\left(a\right)} + \left(\operatorname{re}{\left(a\right)}\right)^{4} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{4} + 4 i \left(\operatorname{re}{\left(a\right)}\right)^{3} \left(\operatorname{im}{\left(a\right)}\right)^{3} - \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{4} - 36 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49 \left(\operatorname{re}{\left(a\right)}\right)^{2} + 2 i \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{5} - 98 i \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)} - \left(\operatorname{im}{\left(a\right)}\right)^{6} - 18 \left(\operatorname{im}{\left(a\right)}\right)^{4} - 49 \left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{4} + 2 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4}\right)}$$
(re(a)^6 - im(a)^6 - 49*im(a)^2 - 18*im(a)^4 - 18*re(a)^4 + 49*re(a)^2 + im(a)^2*re(a)^4 - im(a)^4*re(a)^2 - 36*im(a)^2*re(a)^2 - 98*i*im(a)*re(a) + 2*i*im(a)^5*re(a) + 2*i*re(a)^5*im(a) + 4*i*im(a)^3*re(a)^3)/(4*(im(a)^4 + re(a)^4 + 2*im(a)^2*re(a)^2))
Respuesta rápida [src]
x1 = 1
$$x_{1} = 1$$
       //           2                      2          \                                                       /       4        4           2           2          2      2   \            \   /           2                      2          \                                                                    /                      3                3         \            
       ||         im (a)                 re (a)       | /                      3                3         \   \49 + im (a) + re (a) - 18*re (a) + 18*im (a) - 6*im (a)*re (a)/*im(a)*re(a)|   |         im (a)                 re (a)       | /       4        4           2           2          2      2   \   \-36*im(a)*re(a) - 4*im (a)*re(a) + 4*re (a)*im(a)/*im(a)*re(a)
x2 = I*||- -------------------- + --------------------|*\-36*im(a)*re(a) - 4*im (a)*re(a) + 4*re (a)*im(a)/ - ----------------------------------------------------------------------------| + |- -------------------- + --------------------|*\49 + im (a) + re (a) - 18*re (a) + 18*im (a) - 6*im (a)*re (a)/ + ---------------------------------------------------------------
       ||                     2                      2|                                                                                                      2                            |   |                     2                      2|                                                                                                             2                     
       ||    /  2        2   \      /  2        2   \ |                                                                                     /  2        2   \                             |   |    /  2        2   \      /  2        2   \ |                                                                                            /  2        2   \                      
       \\  4*\im (a) + re (a)/    4*\im (a) + re (a)/ /                                                                                   2*\im (a) + re (a)/                             /   \  4*\im (a) + re (a)/    4*\im (a) + re (a)/ /                                                                                          2*\im (a) + re (a)/                      
$$x_{2} = i \left(\left(\frac{\left(\operatorname{re}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}} - \frac{\left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) \left(4 \left(\operatorname{re}{\left(a\right)}\right)^{3} \operatorname{im}{\left(a\right)} - 4 \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{3} - 36 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}\right) - \frac{\left(\left(\operatorname{re}{\left(a\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4} + 18 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49\right) \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}}{2 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) + \left(\frac{\left(\operatorname{re}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}} - \frac{\left(\operatorname{im}{\left(a\right)}\right)^{2}}{4 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}\right) \left(\left(\operatorname{re}{\left(a\right)}\right)^{4} - 6 \left(\operatorname{re}{\left(a\right)}\right)^{2} \left(\operatorname{im}{\left(a\right)}\right)^{2} - 18 \left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{4} + 18 \left(\operatorname{im}{\left(a\right)}\right)^{2} + 49\right) + \frac{\left(4 \left(\operatorname{re}{\left(a\right)}\right)^{3} \operatorname{im}{\left(a\right)} - 4 \operatorname{re}{\left(a\right)} \left(\operatorname{im}{\left(a\right)}\right)^{3} - 36 \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}\right) \operatorname{re}{\left(a\right)} \operatorname{im}{\left(a\right)}}{2 \left(\left(\operatorname{re}{\left(a\right)}\right)^{2} + \left(\operatorname{im}{\left(a\right)}\right)^{2}\right)^{2}}$$
x2 = i*((re(a)^2/(4*(re(a)^2 + im(a)^2)^2) - im(a)^2/(4*(re(a)^2 + im(a)^2)^2))*(4*re(a)^3*im(a) - 4*re(a)*im(a)^3 - 36*re(a)*im(a)) - (re(a)^4 - 6*re(a)^2*im(a)^2 - 18*re(a)^2 + im(a)^4 + 18*im(a)^2 + 49)*re(a)*im(a)/(2*(re(a)^2 + im(a)^2)^2)) + (re(a)^2/(4*(re(a)^2 + im(a)^2)^2) - im(a)^2/(4*(re(a)^2 + im(a)^2)^2))*(re(a)^4 - 6*re(a)^2*im(a)^2 - 18*re(a)^2 + im(a)^4 + 18*im(a)^2 + 49) + (4*re(a)^3*im(a) - 4*re(a)*im(a)^3 - 36*re(a)*im(a))*re(a)*im(a)/(2*(re(a)^2 + im(a)^2)^2)