Answer
(a) $x\sqrt[4] {3y^2}$
(b) $2x\sqrt[5] {5x^3z^4}$
Work Step by Step
(a) $\sqrt[4] {3x^4y^2}=x\sqrt[4] {3y^2}$
(b) $\sqrt[5] {160x^8z^4}=\sqrt[5] {2^5(5)x^5x^3z^4}=2x\sqrt[5] {5x^3z^4}$
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