Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 4 - Quadratic Functions and Equations - 4-4 Factoring Quadratic Expressions - Practice and Problem-Solving Exercises: 28

Answer

$-(x+5)(x-8)$

Work Step by Step

We start by factoring out -1. We have $-x^2+3x+40=-(x^2-3x-40)$ The factor pairs of -40 are 1 and -40, -1 and 40 2 and -20, -2 and 20 4 and -10, -4 and 10 5 and -8, -5 and 8 5 and -8 add up to -3
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