Answer
$4$
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:
$\sqrt{(-4)^2}=|-4|=4$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
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
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
