# Chapter 7 - Section 7.1 - Radical Expressions and Graphs - 7.1 Exercises: 63

$|x|$

#### Work Step by Step

As shown on page 437, $\sqrt[n] a^{n}=|a|$ when $n$ is an even positive integer. In this case, we know that $\sqrt (x^{2})$ is equivalent to $\sqrt[2] (x^{2})$, since we are taking the square root. Therefore, we know that $\sqrt (x^{2})=\sqrt[2] (x^{2})=|x|$.

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