# How do you simplify (sqrt720)/y^9?

Factor $720$ to see if there are any factors that can be extracted from the radical:
$720 = \left(16\right) \left(9\right) \left(5\right) = \left({4}^{2}\right) \left({3}^{2}\right) \left(5\right)$
$\sqrt{720} = 12 \sqrt{5}$
$\frac{\sqrt{720}}{{y}^{9}} = \frac{12 \sqrt{5}}{{y}^{9}}$ or $= 12 \sqrt{5} {y}^{- 9}$