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What is the simplest form of 4 square root of 81x8y5 ?

User Dan Reedy
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(81x^8y^5)^(1/4)
(81)^(1/4)(x^8)^(1/4)(y^5)^(1/4)
(3)(x^(8/4))(y^(5/4))
3(x^2)(y^(5/4))
User Synapsis
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