Answer
$x-8$.
Work Step by Step
The given polynomial is
$=(-8x-12)+(9x+4)$
Clear the parentheses.
$=-8x-12+9x+4$
Group like terms.
$=-8x+9x-12+4$
Combine like terms.
$=x-8$.
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 7 - Polynomial Equations and Factoring - 7.1 - Adding and Subtracting Polynomials - Exercises - Page 362: 24
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