Answer
$2c^2-4d^2-2cd$.
Work Step by Step
The given polynomial is
$=(c^2-6d^2)+(c^2-2cd+2d^2)$
Clear the parentheses.
$=c^2-6d^2+c^2-2cd+2d^2$
Group like terms.
$=c^2+c^2-6d^2+2d^2-2cd$
Combine like terms.
$=2c^2-4d^2-2cd$.
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 363: 45
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