Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 7 - Section 7.1 - Radical Expressions and Functions - Exercise Set - Page 512: 35



Work Step by Step

RECALL: (i) $\sqrt{a^2} = a$ when $a\ge0$ (ii) $\sqrt{a^2} = |a|$ when $a\lt0$ Use rule (ii) to obtain: $\sqrt{(-4)^2}=|-4|=4$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.