## Algebra 2 (1st Edition)

$(-13)^{2}=169$
$(-13)^{2}\qquad$ ...rewrite $-13$ as $(-1)(13)$ $=((-1)(13))^{2}\qquad$ ...use $(ab)^{2}=a^{2}b^{2}$ $=(-1)^{2}(13)^{2}$ $=1\cdot 169$ $=169$