Answer
$|a|$ is always non-negative because it is the distance from zero.
Work Step by Step
A distance cannot be negative.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 1 - Section 1.2 - Algebraic Expressions and Sets of Numbers - Exercise Set - Page 16: 98
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