Answer
$0$
Work Step by Step
$x=-2$, hence we substitute $-2$ to $x$:
$f(-2)
\\=(-2)^2-4
\\=4-4
\\=0$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 3 - Linear and Quadratic Functions - 3.1 Properties of Linear Functions and Linear Models - 3.1 Assess Your Understanding - Page 126: 5
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