Answer
$(fg)(5)=-135$
Work Step by Step
$(fg)(x)=f(x)g(x)$
$(fg)(5)=f(5)g(5)$
First, find $f(5)$ and $g(5)$.
$f(5)=5^{2}+4\times5=25+20=45$
$g(5)=2-5=-3$
Then, multiply them.
$(fg)(5)=f(5)g(5)=45\times(-3)=-135$
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 2 - Section 2.3 - The Algebra of Functions - Exercise Set - Page 133: 41
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