Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 9 - Roots and Radicals - Chapters 1-9 Cumulative Review Problem Set: 4

Answer

$-8$

Work Step by Step

Recall the following rule: $\sqrt{x^{2}}=x$. Thus, we obtain: $-\sqrt {64}=-\sqrt {8^{2}}=-8$
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