# How do you simplify (3n^2m^4)^2?

$9 {n}^{4} {m}^{8}$
${\left(3 {n}^{2} {m}^{4}\right)}^{2} = {3}^{2} \cdot {\left({n}^{2}\right)}^{2} \cdot {\left({m}^{4}\right)}^{2}$
$= 9 {n}^{4} {m}^{8}$