Answer
$-9x^3-x^2+13x+20$
Work Step by Step
$2f(x)-3g(x)=\\=2(-3x^3-2x^2-x+4)-3(x^3-x^2-5x-4)\\=-6x^3-4x^2-2x+8-3x^3+3x^2+15x+12\\=-9x^3-x^2+13x+20$
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 5 - Section 5.1 - Introduction to Polynomials and Polynomial Functions - Exercise Set - Page 325: 63
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