Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 7 - Section 7.1 - Radical Expressions and Graphs - 7.1 Exercises - Page 440: 55



Work Step by Step

For any real number $a$, $\sqrt (a^{2})=|a|$. That is, the principal square root of $a^{2}$ is the absolute value of $a$. Therefore, $\sqrt (-10)^{2}=|-10|=10$.
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