$$y = 2 ( x - 3 ) ^ { 2 } + 5$$
$y=2\left(x-3\right)^{2}+5$
$x=-\frac{\sqrt{2y-10}}{2}+3$
$x=\frac{\sqrt{2y-10}}{2}+3$
$x=-\frac{\sqrt{2y-10}}{2}+3$
$x=\frac{\sqrt{2y-10}}{2}+3\text{, }y\geq 5$
