Evaluate fourth root of 81y^8x^4

$\sqrt[4]{81 y^{8} x^{4}}$

Step 1

Rewrite $81 y^{8} x^{4}$ as ${(3 y^{2} x)}^{4}$ .

$\sqrt[4]{{(3 y^{2} x)}^{4}}$

Step 2

Pull terms out from under the radical, assuming positive real numbers.

$3 y^{2} x$

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