Answer
$4$
Work Step by Step
To create a perfect square trinomial you take the coefficient of x, divide it by two, and square the results. OR $(\frac{b}{2})^{2}$. In this problem $b=4$. So $(\frac{4}{2})^{2}=(2)^{2}=4$.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 8 - Section 8.5 - Quadratic Functions and Their Graphs - Exercise Set - Page 519: 56
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