Question

$$y=x^{2}+1$$

Solve for x (complex solution)

$x=-\sqrt{y-1}$
$x=\sqrt{y-1}$

Solve for x

$x=\sqrt{y-1}$
$x=-\sqrt{y-1}\text{, }y\geq 1$

Solve for y

$y=x^{2}+1$