Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 11 - Section 11.2 - Solving Quadratic Equations by Completing the Square - Exercise Set: 68

Answer

$y=23$

Work Step by Step

$\sqrt{y+2}+7=12 \\ \sqrt{y+2}=12-7 \\ \sqrt{y+2}=5 \\ (\sqrt{y+2})^2 = (5)^2 \\ y+2=25 \\ y=25-2 \\ y=23$
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