Answer
$y=23$
Work Step by Step
$\sqrt{y+2}+7=12 \\ \sqrt{y+2}=12-7 \\ \sqrt{y+2}=5 \\ (\sqrt{y+2})^2 = (5)^2 \\ y+2=25 \\ y=25-2 \\ y=23$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
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 - Page 779: 68
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