Question

factorize
$9a {}^{2} - 121b {}^{2}$
please please do this I am crying for some days because I not do the some you help me ​

Answer 1

Answer:

(3a+11b)(3a-11b)

Explanation:

Identity used here - $a^2-b^2 = (a+b)(a-b)$

$9a^2 - 121b^2\\= (3a)^2-(11b)^2\\= (3a+11b)(3a-11b)$

Answer 2

Hope this helps.........