Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Chapter 1 - Review - True-False Quiz - Page 69: 14


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 $9=|-9|.$
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