$a=-\sqrt{-bcx+dy-ey}$
$a=\sqrt{-bcx+dy-ey}\text{, }d\neq e$

$\left\{\begin{matrix}b=-\frac{a^{2}+ey-dy}{cx}\text{, }&c\neq 0\text{ and }x\neq 0\text{ and }d\neq e\\b\in \mathrm{C}\text{, }&y=-\frac{a^{2}}{e-d}\text{ and }d\neq e\text{ and }\left(c=0\text{ or }x=0\right)\end{matrix}\right.$

$\left\{\begin{matrix}b=-\frac{a^{2}+ey-dy}{cx}\text{, }&c\neq 0\text{ and }x\neq 0\text{ and }d\neq e\\b\in \mathrm{R}\text{, }&y=-\frac{a^{2}}{e-d}\text{ and }d\neq e\text{ and }\left(c=0\text{ or }x=0\right)\end{matrix}\right.$