How do you simplify (3^-2)^2?

Jun 2, 2018

$\frac{1}{81}$
${\left({a}^{m}\right)}^{n} = {a}^{m n}$
${\left({3}^{- 2}\right)}^{2} = {3}^{- 4} = \frac{1}{3} ^ 4 = \frac{1}{81}$