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sqrt(x-y^2) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
   ________    
  /      2     
\/  x - y   = 0
$$\sqrt{x - y^{2}} = 0$$
Solución detallada
$$\sqrt{x - y^{2}} = 0$$
cambiamos
$$x - y^{2} = 0$$
Es la ecuación de la forma
a*y^2 + b*y + c = 0

La ecuación cuadrática puede ser resuelta
con la ayuda del discriminante.
Las raíces de la ecuación cuadrática:
$$y_{1} = \frac{\sqrt{D} - b}{2 a}$$
$$y_{2} = \frac{- \sqrt{D} - b}{2 a}$$
donde D = b^2 - 4*a*c es el discriminante.
Como
$$a = -1$$
$$b = 0$$
$$c = x$$
, entonces
D = b^2 - 4 * a * c = 

(0)^2 - 4 * (-1) * (x) = 4*x

La ecuación tiene dos raíces.
y1 = (-b + sqrt(D)) / (2*a)

y2 = (-b - sqrt(D)) / (2*a)

o
$$y_{1} = - \sqrt{x}$$
$$y_{2} = \sqrt{x}$$
Gráfica
Suma y producto de raíces [src]
suma
     _________________                                 _________________                               _________________                                 _________________                         
  4 /   2        2        /atan2(im(x), re(x))\     4 /   2        2        /atan2(im(x), re(x))\   4 /   2        2        /atan2(im(x), re(x))\     4 /   2        2        /atan2(im(x), re(x))\
- \/  im (x) + re (x) *cos|-------------------| - I*\/  im (x) + re (x) *sin|-------------------| + \/  im (x) + re (x) *cos|-------------------| + I*\/  im (x) + re (x) *sin|-------------------|
                          \         2         /                             \         2         /                           \         2         /                             \         2         /
$$\left(- i \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)} - \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)}\right) + \left(i \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)} + \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)}\right)$$
=
0
$$0$$
producto
/     _________________                                 _________________                         \ /   _________________                                 _________________                         \
|  4 /   2        2        /atan2(im(x), re(x))\     4 /   2        2        /atan2(im(x), re(x))\| |4 /   2        2        /atan2(im(x), re(x))\     4 /   2        2        /atan2(im(x), re(x))\|
|- \/  im (x) + re (x) *cos|-------------------| - I*\/  im (x) + re (x) *sin|-------------------||*|\/  im (x) + re (x) *cos|-------------------| + I*\/  im (x) + re (x) *sin|-------------------||
\                          \         2         /                             \         2         // \                        \         2         /                             \         2         //
$$\left(- i \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)} - \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)}\right) \left(i \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)} + \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)}\right)$$
=
    _________________                       
   /   2        2      I*atan2(im(x), re(x))
-\/  im (x) + re (x) *e                     
$$- \sqrt{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} e^{i \operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}$$
-sqrt(im(x)^2 + re(x)^2)*exp(i*atan2(im(x), re(x)))
Respuesta rápida [src]
          _________________                                 _________________                         
       4 /   2        2        /atan2(im(x), re(x))\     4 /   2        2        /atan2(im(x), re(x))\
y1 = - \/  im (x) + re (x) *cos|-------------------| - I*\/  im (x) + re (x) *sin|-------------------|
                               \         2         /                             \         2         /
$$y_{1} = - i \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)} - \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)}$$
        _________________                                 _________________                         
     4 /   2        2        /atan2(im(x), re(x))\     4 /   2        2        /atan2(im(x), re(x))\
y2 = \/  im (x) + re (x) *cos|-------------------| + I*\/  im (x) + re (x) *sin|-------------------|
                             \         2         /                             \         2         /
$$y_{2} = i \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)} + \sqrt[4]{\left(\operatorname{re}{\left(x\right)}\right)^{2} + \left(\operatorname{im}{\left(x\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(\operatorname{im}{\left(x\right)},\operatorname{re}{\left(x\right)} \right)}}{2} \right)}$$
y2 = i*(re(x)^2 + im(x)^2)^(1/4)*sin(atan2(im(x, re(x))/2) + (re(x)^2 + im(x)^2)^(1/4)*cos(atan2(im(x), re(x))/2))