#### Answer

$|x|$

#### Work Step by Step

According to the text, if n is an even positive integer, then $\sqrt[n] {x^{n}}=|x|$.
Therefore, $\sqrt {x^{2}}=|x|$.

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$|x|$

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