Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - 4.3 Solve x(squared) + bx + c = 0 - 4.3 Exercises - Skill Practice - Page 255: 6



Work Step by Step

We try to find factors of c in $x^2+bx+c$ that add to negative b, In this case... $r^2+15r+56$ $r^2+7r+8r+56$ $r(r+7)+8(r+7)$ $(r+7)(r+8)$
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