Answer
$-x^3+8x^2+2x+7$
Work Step by Step
Let p(x) be the unknown polynomial:
$p(x)-(-x^3+3x^2+2x-1)=5x^2+8$
$p(x)=(-x^3+3x^2+2x-1)+5x^2+8=-x^3+8x^2+2x+7$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Prerequisites - P.3 - Polynomials and Special Products - Exercises - Page 33: 91
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