Factor 49x^2-121

$49 x^{2} - 121$

Step 1

Rewrite $49 x^{2}$ as ${(7 x)}^{2}$ .

${(7 x)}^{2} - 121$

Step 2

Rewrite $121$ as $11^{2}$ .

${(7 x)}^{2} - 11^{2}$

Step 3

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 7 x$ and $b = 11$ .

$(7 x + 11) (7 x - 11)$

Factor 49x^2-121

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