Answer
-2
Work Step by Step
If a=-12, and b=-48, in order to evaluate the expression $\frac{-b}{2a}$ all we must do is simply plug in the givens into the expression.
$\frac{-b}{2a}$=$\frac{-(-48)}{2(-12)}$=$\frac{48}{-24}$=-2
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-1 Quadratic Graphs and Their Properties - Mixed Review - Page 540: 65
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