Answer
$2x$.
Work Step by Step
The given expression is
$=\sqrt{4x^2}$
Use product property of square roots.
$=\sqrt{4}\cdot \sqrt{x^2}$
Use $4=2^2$.
$=\sqrt{2^2}\cdot \sqrt{x^2}$
Simplify.
$=2x$.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 9 - Solving Quadratic Equations - 9.1 - Properties of Radicals - Exercises - Page 485: 18
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