Answer
$x=\pm 4$
Work Step by Step
$ 4x^{2}=64\qquad$ ...divide each term with $4$.
$ x^{2}=16\qquad$ ...take square roots of each side.
$ x=\pm\sqrt{16}\qquad$ ...evaluate $\sqrt{16}$
$x=\pm 4$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 4 Quadratic Functions and Factoring - 4.7 Complete the Square - 4.7 Exercises - Quiz for Lessons 4.5-4.7 - Page 291: 1
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