Answer
$-3$
Work Step by Step
Given: $x^2+6x+9=0$
Need to use factorization to solve the quadratic equation.
This can be factorized as follows:
$x^2+2(x)(3)+3^2=0$
or, $(x+3)^2=0$
Now $x+3=0$
This implies $x=-3$
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 5 - Section 5.7 - Polynomial Equations and Their Applications - Exercise Set - Page 390: 16
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