Answer
$8x^{2}+4x-20$
Work Step by Step
$(5x^{2}-6x-12)-(-3x^{2}-10x+8)$
$=5x^{2}-6x-12+3x^{2}+10x-8$
$=5x^{2}+3x^{2}-6x+10x-12-8$
$=8x^{2}+4x-20$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 3 - Exponents, Polynomials and Functions - 3.2 Combining Functions - 3.2 Exercises - Page 244: 31
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