Answer
$7x^2-4x-5$
Work Step by Step
The given expression simplifies to
\begin{array}{l}
(2x^2+6x-5)+(5x^2-10x)
\\=
(2x^2+5x^2)+(6x-10x)-5
\\=
7x^2-4x-5
.\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Sections 5.1-5.7 - Integrated Review - Operations on Polynomials and Factoring Strategies - Page 310: 4
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