Answer
$-7a\sqrt[3]{3a}$
Work Step by Step
$2\sqrt[3] {3a^4}-3a\sqrt[3]{81a}$ Factor.
$2\sqrt[3] {a^3}\sqrt[3]{3a}-3a\sqrt[3]{27}\sqrt[3]{3a}$ Simplify.
$2a\sqrt[3]{3a}-9a\sqrt[3]{3a}$ Combine like radicals.
$-7a\sqrt[3]{3a}$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 10 - Section 10.4 - Adding, Subtracting, and Multiplying Radical Expressions - Exercise Set - Page 709: 8
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