Answer
$$(b-7)(b-1)$$
Work Step by Step
Consider all the pairs of factors of $7$. Find the pair that sum to $-8$:
$$(-7)\times (-1)=7$$
$$-7-1=-8$$
$$b^2-8b+7=(b-7)(b-1)$$
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter R - Algebra Reference - R.2 Factoring - R.2 Exercises - Page R-8: 8
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