Answer
$2x^2-5x+8$
Work Step by Step
Combine like terms to simplify.
$(3x^2+4x-12)-(x^2+9x-20)$
$=3x^2+4x-12-x^2-9x+20$
$=2x^2-5x+8$
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 1-6 - Cumulative Review - Page 548: 56
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