Question

if x^3=891 and y^3=1089 find the value of xy

Answer 1

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$\sqrt[3]{x} \times \sqrt[3]{y} \\ \\ \sqrt[3]{xy} \\ \\ \sqrt[3]{891 \times 1089} \\ \\ \sqrt[3]{970299} \\ \\ \therefore \: xy \: = 99$

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Answer 2

$\sqrt[3]{x} \times \sqrt[3]{y} \\ = \sqrt[3]{xy}$

THEREFORE, XY=99