SOLUTION: What is the 4th root of 81x^8y^16? Could you please send work as well? thanks

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Question 610687: What is the 4th root of 81x^8y^16?
Could you please send work as well?
thanks
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(3^4 * x^8 * y^16)^(1/4)

3 x^2 y^4