Applicare la formula: $x+a=b$$\to x=b-a$, dove $a=x^2$, $b=0$, $x+a=b=y^{\ln\left('y\right)}+x^2=0$, $x=y^{\ln\left('y\right)}$ e $x+a=y^{\ln\left('y\right)}+x^2$

Applicare la formula: $y^a=b$$\to y=b^{\frac{sign\left(a\right)}{\left|a\right|}}$, dove $a=\ln\left('y\right)$ e $b=-x^2$