Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 10 - Exponents and Radicals - 10.2 Rational Numbers as Exponents - 10.2 Exercise Set - Page 641: 111

Answer

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Work Step by Step

In the first case, we are taking a cube root, and we can take a cube root of all numbers, even if they are negative. However, in the latter case, we are taking a square root, which is only valid when $x$ is positive.
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