Question

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

Answer 1

$$\begin{gathered} 36l^2-(m+n{)}^2 \\ =(6l{)}^2-(m+n{)}^2 \\ =[6l-(m+n)\left]\right[6l+(m+n)] \\ =(6l-m-n\left)\right(6l+m+n) \end{gathered}$$