Answer
$5x^3-2x^2+12x-15$
Work Step by Step
$(7x^3-8x^2+9x-6)-(2x^3-6x^2-3x+9)\\=(7x^3-2x^3)+(-8x^2+6x^2)+(9x+3x)+(-6-9)\\=5x^3-2x^2+12x-15$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 4 - Section 4.5 - Linear Programming - Exercise Set - Page 305: 39
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