Question

Which is equal to 12m + 12n A. 12mn B 12m + n C 12m - 2n d. 12 (m+n)

Answer 1

$12m+12n=12(m+n)$

The answer is D.

Answer 2

$12m+12n=12\times m+12\times n\\\\exclude\ common\ factor\ before\ parenthesis:\\\\\boxed{12m+12n=12(m+n)}\leftarrow answer\ \boxed{d.}$