Answer
Not true.
Work Step by Step
If $x$ is real number, in fact
$$\sqrt{x^2}=|x|.$$
For example if $x=-9$ then
$$\sqrt{x^2}=\sqrt{(-9)^2}=\sqrt{81} = 9$$
and we see that $9=|-9|.$
Calculus: Early Transcendentals 8th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1285741552
ISBN 13:
978-1-28574-155-0
Chapter 1 - Review - True-False Quiz - Page 69: 14
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