Question

The greatest common factor of 3m2n + 12mn2 is

Answer 1

$3m^2n + 12mn^2=3mn\cdot(m+4n)$

Answer 2

$3m^{2}n + 12mn^{2}$

$3mn( m + 4n)$

So, $3mn$ is the greatest common factor of $3m^{2}n + 12mn^{2}$