Factor y^2-49

$y^{2} - 49$

Step 1

Rewrite $49$ as $7^{2}$ .

$y^{2} - 7^{2}$

Step 2

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = y$ and $b = 7$ .

$(y + 7) (y - 7)$