Answer
$f(3) = -21$
Work Step by Step
RECALL:
$f(a)$ represents the value of the function $f$ when $x=a$.
Substitute $3$ into $x$ in the function $f$ to obtain:
$f(3) = -4(3^2)+5(3)
\\f(3) = -4(9) + 15
\\f(3) = -36 + 15
\\f(3) = -21$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 5 - Exponential and Logarithmic Functions - 5.1 Composite Functions - 5.1 Assess Your Understanding - Page 254: 1
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