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-((sqrt(2)/2)*x-(sqrt(2)/2)*y)^2-4*((sqrt(2)/2)*x-(sqrt(2)/2)*y)*((sqrt(2)/2)*x+(sqrt(2)/2)*y)-((sqrt(2)/2)*x+(sqrt(2)/2)*y)^2+3=0 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
                     2                                                                  2        
  /  ___       ___  \      /  ___       ___  \ /  ___       ___  \   /  ___       ___  \         
  |\/ 2      \/ 2   |      |\/ 2      \/ 2   | |\/ 2      \/ 2   |   |\/ 2      \/ 2   |         
- |-----*x - -----*y|  - 4*|-----*x - -----*y|*|-----*x + -----*y| - |-----*x + -----*y|  + 3 = 0
  \  2         2    /      \  2         2    / \  2         2    /   \  2         2    /         
$$\left(- \left(x \frac{\sqrt{2}}{2} + y \frac{\sqrt{2}}{2}\right)^{2} + \left(- \left(x \frac{\sqrt{2}}{2} - y \frac{\sqrt{2}}{2}\right)^{2} - 4 \left(x \frac{\sqrt{2}}{2} - y \frac{\sqrt{2}}{2}\right) \left(x \frac{\sqrt{2}}{2} + y \frac{\sqrt{2}}{2}\right)\right)\right) + 3 = 0$$
Solución detallada
Abramos la expresión en la ecuación
$$\left(- \left(x \frac{\sqrt{2}}{2} + y \frac{\sqrt{2}}{2}\right)^{2} + \left(- \left(x \frac{\sqrt{2}}{2} - y \frac{\sqrt{2}}{2}\right)^{2} - 4 \left(x \frac{\sqrt{2}}{2} - y \frac{\sqrt{2}}{2}\right) \left(x \frac{\sqrt{2}}{2} + y \frac{\sqrt{2}}{2}\right)\right)\right) + 3 = 0$$
Obtenemos la ecuación cuadrática
$$- 3 x^{2} + y^{2} + 3 = 0$$
Es la ecuación de la forma
a*x^2 + b*x + c = 0

La ecuación cuadrática puede ser resuelta
con la ayuda del discriminante.
Las raíces de la ecuación cuadrática:
$$x_{1} = \frac{\sqrt{D} - b}{2 a}$$
$$x_{2} = \frac{- \sqrt{D} - b}{2 a}$$
donde D = b^2 - 4*a*c es el discriminante.
Como
$$a = -3$$
$$b = 0$$
$$c = y^{2} + 3$$
, entonces
D = b^2 - 4 * a * c = 

(0)^2 - 4 * (-3) * (3 + y^2) = 36 + 12*y^2

La ecuación tiene dos raíces.
x1 = (-b + sqrt(D)) / (2*a)

x2 = (-b - sqrt(D)) / (2*a)

o
$$x_{1} = - \frac{\sqrt{12 y^{2} + 36}}{6}$$
$$x_{2} = \frac{\sqrt{12 y^{2} + 36}}{6}$$
Gráfica
Respuesta rápida [src]
           _______________________________________________                                                            _______________________________________________                                                   
          /                          2                        /     /                       2          2   \\        /                          2                        /     /                       2          2   \\
       4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|     4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|
       \/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *cos|---------------------------------------------|   I*\/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *sin|---------------------------------------------|
                                                              \                      2                      /                                                            \                      2                      /
x1 = - ------------------------------------------------------------------------------------------------------ - --------------------------------------------------------------------------------------------------------
                                                         3                                                                                                         3                                                    
$$x_{1} = - \frac{i \sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3} - \frac{\sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3}$$
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        /                          2                        /     /                       2          2   \\        /                          2                        /     /                       2          2   \\
     4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|     4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|
     \/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *cos|---------------------------------------------|   I*\/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *sin|---------------------------------------------|
                                                            \                      2                      /                                                            \                      2                      /
x2 = ------------------------------------------------------------------------------------------------------ + --------------------------------------------------------------------------------------------------------
                                                       3                                                                                                         3                                                    
$$x_{2} = \frac{i \sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3} + \frac{\sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3}$$
x2 = i*((3*re(y)^2 - 3*im(y)^2 + 9)^2 + 36*re(y)^2*im(y)^2)^(1/4)*sin(atan2(6*re(y)*im(y, 3*re(y)^2 - 3*im(y)^2 + 9)/2)/3 + ((3*re(y)^2 - 3*im(y)^2 + 9)^2 + 36*re(y)^2*im(y)^2)^(1/4)*cos(atan2(6*re(y)*im(y), 3*re(y)^2 - 3*im(y)^2 + 9)/2)/3)
Suma y producto de raíces [src]
suma
      _______________________________________________                                                            _______________________________________________                                                          _______________________________________________                                                            _______________________________________________                                                   
     /                          2                        /     /                       2          2   \\        /                          2                        /     /                       2          2   \\      /                          2                        /     /                       2          2   \\        /                          2                        /     /                       2          2   \\
  4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|     4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|   4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|     4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|
  \/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *cos|---------------------------------------------|   I*\/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *sin|---------------------------------------------|   \/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *cos|---------------------------------------------|   I*\/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *sin|---------------------------------------------|
                                                         \                      2                      /                                                            \                      2                      /                                                          \                      2                      /                                                            \                      2                      /
- ------------------------------------------------------------------------------------------------------ - -------------------------------------------------------------------------------------------------------- + ------------------------------------------------------------------------------------------------------ + --------------------------------------------------------------------------------------------------------
                                                    3                                                                                                         3                                                                                                         3                                                                                                         3                                                    
$$\left(- \frac{i \sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3} - \frac{\sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3}\right) + \left(\frac{i \sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3} + \frac{\sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3}\right)$$
=
0
$$0$$
producto
/      _______________________________________________                                                            _______________________________________________                                                   \ /    _______________________________________________                                                            _______________________________________________                                                   \
|     /                          2                        /     /                       2          2   \\        /                          2                        /     /                       2          2   \\| |   /                          2                        /     /                       2          2   \\        /                          2                        /     /                       2          2   \\|
|  4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|     4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|| |4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/|     4 /  /        2          2   \         2      2        |atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/||
|  \/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *cos|---------------------------------------------|   I*\/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *sin|---------------------------------------------|| |\/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *cos|---------------------------------------------|   I*\/   \9 - 3*im (y) + 3*re (y)/  + 36*im (y)*re (y) *sin|---------------------------------------------||
|                                                         \                      2                      /                                                            \                      2                      /| |                                                       \                      2                      /                                                            \                      2                      /|
|- ------------------------------------------------------------------------------------------------------ - --------------------------------------------------------------------------------------------------------|*|------------------------------------------------------------------------------------------------------ + --------------------------------------------------------------------------------------------------------|
\                                                    3                                                                                                         3                                                    / \                                                  3                                                                                                         3                                                    /
$$\left(- \frac{i \sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3} - \frac{\sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3}\right) \left(\frac{i \sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \sin{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3} + \frac{\sqrt[4]{\left(3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9\right)^{2} + 36 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} \cos{\left(\frac{\operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}{2} \right)}}{3}\right)$$
=
     __________________________________________                                                  
    /                      2                            /                       2          2   \ 
   /  /      2        2   \        2      2      I*atan2\6*im(y)*re(y), 9 - 3*im (y) + 3*re (y)/ 
-\/   \3 + re (y) - im (y)/  + 4*im (y)*re (y) *e                                                
-------------------------------------------------------------------------------------------------
                                                3                                                
$$- \frac{\sqrt{\left(\left(\operatorname{re}{\left(y\right)}\right)^{2} - \left(\operatorname{im}{\left(y\right)}\right)^{2} + 3\right)^{2} + 4 \left(\operatorname{re}{\left(y\right)}\right)^{2} \left(\operatorname{im}{\left(y\right)}\right)^{2}} e^{i \operatorname{atan_{2}}{\left(6 \operatorname{re}{\left(y\right)} \operatorname{im}{\left(y\right)},3 \left(\operatorname{re}{\left(y\right)}\right)^{2} - 3 \left(\operatorname{im}{\left(y\right)}\right)^{2} + 9 \right)}}}{3}$$
-sqrt((3 + re(y)^2 - im(y)^2)^2 + 4*im(y)^2*re(y)^2)*exp(i*atan2(6*im(y)*re(y), 9 - 3*im(y)^2 + 3*re(y)^2))/3