Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 7 - Section 7.1 - Radicals and Radical Functions - Exercise Set: 44



Work Step by Step

We are told that $\sqrt[n] a^{n}=|a|$, when n is an even positive integer. In this case, $a=-7$. $\sqrt (a)^{2}=|a|$ $|-7|=7$
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