Answer
$$x=\pm 7$$
Work Step by Step
We square both sides of the equation to obtain:
$$ x=\sqrt{49} \\x=\pm 7$$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.4 - Quadratic Equations and Applications - 1.4 Exercises - Page 110: 19
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