Answer
$x^2+9$.
Work Step by Step
The given polynomial is
$=(2x^2+5)+(-x^2+4)$
Clear the parentheses.
$=2x^2+5-x^2+4$
Group like terms.
$=2x^2-x^2+5+4$
Combine like terms.
$=x^2+9$.
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 - 7.1-7.4 - Quiz - Page 384: 5
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