Answer
$u=c$ or $u=-c$
Work Step by Step
$|u|=|c|$ is equivalent to $u=c$ or $u=-c$ because $|u|=u$ if $u\gt0$ and $|u|=-u$ if $u\leq0$.
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 4 - Section 4.3 - Equations and Inequalities Involving Absolute Value - Concept and Vocabulary Check - Page 283: 2
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