$$14y=3+2x^{2}$$
$y=\frac{x^{2}}{7}+\frac{3}{14}$
$x=-\frac{\sqrt{28y-6}}{2}$
$x=\frac{\sqrt{28y-6}}{2}$
$x=\frac{\sqrt{28y-6}}{2}$
$x=-\frac{\sqrt{28y-6}}{2}\text{, }y\geq \frac{3}{14}$