Algebra and Trigonometry 10th Edition

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

Answer

$$x=\pm 7$$

Work Step by Step

We square both sides of the equation to obtain: $$ x=\sqrt{49} \\x=\pm 7$$
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