Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 9 - Cumulative Review: 21



Work Step by Step

$r^{2}$ -r -42=$r^{2}$ -7r +6r-42= r(r-7)+6(r-7)=(r+6)(r-7)
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