Factor k^2-16

$k^{2} - 16$

Step 1

Rewrite $16$ as $4^{2}$ .

$k^{2} - 4^{2}$

Step 2

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = k$ and $b = 4$ .

$(k + 4) (k - 4)$