Answer
$3\sqrt[3]{3}$
Work Step by Step
Rewrite 81 as 3 to the power 4. The simplify the radical.
$\sqrt[3]{3^4}=3\sqrt[3]{3}$
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter R - Section R.7 - Radical Expressions - R.7 Exercises - Page 67: 33
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