SOLUTION: Hi there! I need help with cubed roots. Here is my problem. I need to simplify it ^3sqrt(54y^21) Thank you for your help!

Question 704429: Hi there! I need help with cubed roots. Here is my problem. I need to simplify it
^3sqrt(54y^21)
Thank you for your help!
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!


∛54y²¹

∛27�2y²¹

∛3³�2y²¹

Since both exponents 3 and 21 are divisible
by the index of cube roots, which is 3, we
divide the two exponents by 3 and take them
out in front of the radical, and leave just 
the 2 under the radical:

3y⁷∛2

Edwin

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