Answer
$\{-\sqrt{3},\sqrt{3}\}$
Work Step by Step
Taking the square root of both sides (Square Root Property), the given equation, $
p^2=3
,$ is equivalent to
\begin{align*}
p&=\pm\sqrt{3}
.\end{align*}
Hence, the solution set of $
p^2=3
$ is $
\{-\sqrt{3},\sqrt{3}\}
$.