Answer
$2$
Work Step by Step
RECALL:
For a positive real number $a$:
$\sqrt{a^2}=a$
Substitute $2$ in for $x$ to obtain:
$=\sqrt{2^2}$
Use the rule above to obtain:
$\sqrt{2^2}=2$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter R - Section R.2 - Algebra Essentials - R.2 Assess Your Understanding - Page 28: 103
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