Answer
$2x^{2}-6x$
Work Step by Step
We are given that $f(x)=x^{2}-9$, $g(x)=2x$, and $h(x)=x-3$.
We know that $(gh)(x)=g(x)\times x(x)$.
Therefore, $(gh)(x)=(2x)\times(x-3)=2x\times x+2x\times-3=2x^{1+1}-6x=2x^{2}-6x$.
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter 4 - Section 4.4 - Multiplying Polynomials - 4.4 Exercises - Page 306: 115
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