Answer
All real numbers except $-2$.
Work Step by Step
Note that $x^2+4x+4=(x+2)^2.$
Since the denominator cannot be $0$, then:
$x+2\ne 0\\
x\ne0-2\\
x\ne -2$
Hence, the domain is all real numbers except $-2$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 4 - Polynomial and Rational Functions - 4.2 Properties of Rational Functions - 4.2 Assess Your Understanding - Page 197: 26
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