Answer
$-2x^2+2x+3$
Work Step by Step
Given: $x^2-4x+15-3x^2+6x-12$
Simplify
$=(x^2-3x^2)+(-4x+6x)+(15-12)$
$=-2x^2+2x+3$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 5 Polynomials and Polynomial Functions - 5.5 Apply the Remainder and Factor Theorems - 5.5 Exercises - Mixed Review - Page 368: 57
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