Answer
$-5s^3+2s^2-s-9$.
Work Step by Step
The given polynomial is
$=(s^3-2s-9)+(2s^2-6s^3+s)$
Clear the parentheses.
$=s^3-2s-9+2s^2-6s^3+s$
Group like terms.
$=s^3-6s^3+2s^2-2s+s-9$
Combine like terms.
$=-5s^3+2s^2-s-9$.
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: 30
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