Answer
$-7$.
Work Step by Step
The given expression is
$=x^2+8x+5$
Substitute $-2$ for $x$.
$=(-2)^2+8(-2)+5$
Evaluate the power.
$=(4)+8(-2)+5$
Multiply.
$=4-16+5$
Add.
$=9-16$
Subtract.
$=-7$.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 8 - Graphing Quadratic Functions - Maintaining Mathematical Proficiency - Page 417: 8
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