Answer
$b^{2}$ -3b -4
Work Step by Step
( b+1)(b-4) FOIL method
(b)(b) +(b)(-4) + (1)(b) +(1)(-4)
$b^{2}$ -4b + b -4
$b^{2}$ -3b -4
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 6 - Section 6.1 - The Greatest Common Factor - Exercise Set - Page 422: 83
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