posted by jim .
simplify square root of 27r^5
Try to break this down as far as you can to simplify.
√(9 * 3)(r^4 * r)
The square root of 9 is 3. The square root of r^4 is r^2.
Therefore, you end up with this:
3r^2√3r ---> 3r is left under the square root sign.
I hope this will help.