# How do you simplify sqrt(-144)?

$\pm 12 i$
$\sqrt{- 144} = \sqrt{144 \times - 1} = \sqrt{144} \times \sqrt{-} 1$
$\textcolor{w h i t e}{\times \times \times \times \times \times \times x} = \pm 12 \times i = \pm 12 i$