Answer
7
Work Step by Step
We are told that $\sqrt[n] a^{n}=|a|$, when n is an even positive integer.
In this case, $a=-7$.
$\sqrt (a)^{2}=|a|$
$|-7|=7$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 7 - Section 7.1 - Radicals and Radical Functions - Exercise Set - Page 417: 44
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