Factorize each of the following expression:

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Question:
Factorize each of the following expression:
36l2 − (m + n)2

Solution:

$36 l^{2}-(m+n)^{2}$

$=(6 l)^{2}-(m+n)^{2}$

$=[6 l-(m+n)][6 l+(m+n)]$

$=(6 l-m-n)(6 l+m+n)$