Question

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

Answer 1

Factor `720` to see if there are any factors that can be extracted from the radical:
`720 = (16)(9)(5) = (4^2)(3^2)(5)`
So
`sqrt(720) = 12 sqrt(5)`

There isn't much that can be done with the denominator (perhaps it was meant to be inside the square root?)

So the answer is
`sqrt(720)/(y^9) = (12 sqrt(5))/(y^9)` or `= 12 sqrt(5) y^(-9)`