Answer
$|a|$
Work Step by Step
As written on page 37;
$\sqrt {a^{2}} = |a|$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Prerequisites: Fundamental Concepts of Algebra - Concept and Vocabulary Check - Page 48: 3
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