Answer
$b^{2}$ -9
Work Step by Step
( b + 3 ) ( b - 3) the som and difference of the same two terms
$b^{2}$ - $3^{2}$
$b^{2}$ -9
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Section 5.6 - Special Products - Exercise Set - Page 388: 40
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