$$\left. \begin{array} { l } { y = 2 x ^ { 2 } - 8 x + 3 } \end{array} \right.$$
$x=\frac{\sqrt{2y+10}}{2}+2$
$x=-\frac{\sqrt{2y+10}}{2}+2$
$x=\frac{\sqrt{2y+10}}{2}+2$
$x=-\frac{\sqrt{2y+10}}{2}+2\text{, }y\geq -5$
