Answer
79
Work Step by Step
We can find the value of $Q(4)$ by plugging 4 into the formula for $Q(x)$.
$Q(x)=5x^{2}-1$
$Q(4)=5(4^{2})-1=5\times(4\times4)-1=5\times16-1=80-1=79$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.3 - Polynomials and Polynomial Functions - Exercise Set - Page 279: 20
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