Question

If $m=3$ and $n=2$, then $(2m+3n{)}^2=$

• A. $12$
• B. $169$
• C. $144$
• D. $121$

Answer 1

The correct option is C $144$

Substituting:
$m=3,n=2$ in $(2m+3n)=(2\times 3+3\times 2{)}^2$
$=(6+6{)}^2$
$={12}^2$
$=144$