$\left\{\begin{matrix}y=\frac{\sqrt{x}}{z}\text{, }&x\neq 0\text{ and }z\neq 0\\y\neq 0\text{, }&z=0\text{ and }x=0\end{matrix}\right.$

$x=\left(yz\right)^{2}$
$\left(z\leq 0\text{ and }y<0\right)\text{ or }\left(z\geq 0\text{ and }y>0\right)$

$\left\{\begin{matrix}y=\frac{\sqrt{x}}{z}\text{, }&z\neq 0\text{ and }x>0\\y\neq 0\text{, }&x=0\text{ and }z=0\end{matrix}\right.$

$x=\left(yz\right)^{2}$
$\left(z=0\text{ or }arg(yz)<\pi \right)\text{ and }y\neq 0$