Answer
$(a+1)(b-c)$
Work Step by Step
$ab-c-ac+b=\\=ab+b-ac-c\\=b(a+1)-c(a+1)\\=(a+1)(b-c)$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 5 - Section 5.3 - Greatest Common Factors and Factoring by Grouping - Exercise Set - Page 348: 69
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