Answer
{-10,-4}
Work Step by Step
Given: $(x+7)^2=9$
Apply The Square Root Property.
This can be written as: $(x+7)=\sqrt{9}$
or, $(x+7)=\pm 3$
or, $x=-7+3,-7-3$
or,$x=-4,-10$
Hence, solution set is $x=${-10,-4}
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 8 - Section 8.1 - The Square Root Property and Completing the Square - Exercise Set - Page 592: 11
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