## Algebra 2 (1st Edition)

$s=\pm i\sqrt{3}$
$s^{2}+12=9\qquad$ ...add $-12$ to each side of the expression. $s^{2}=-3\qquad$ ...take square roots of each side. $s=\pm\sqrt{-3}\qquad$ ...write in terms of $i$. $s=\pm i\sqrt{3}$