Answer
$\color{blue}{\sqrt[3]{36xy}}$
Work Step by Step
Use the rule $\sqrt[3]{a}\cdot \sqrt[3]{b}=\sqrt[3]{ab}$ to obtain:
$=\sqrt[3]{9x(4y)}
\\=\color{blue}{\sqrt[3]{36xy}}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter R - Review of Basic Concepts - R.7 Radical Expressions - R.7 Exercises - Page 75: 48
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