Answer
The student forgot to multiply $-6 * -4$ and cancel the negative sign.
Work Step by Step
$-4*2*-6 = 48$, not $-48$
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 - 9-6 The Quadratic Formula and the Discriminant - Practice and Problem-Solving Exercises - Page 572: 44
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