Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 10 - Section 10.3 - Finding Binomial Factors - Exercise: 39

Answer

$(r+5)(r-7)$

Work Step by Step

$r^2-2r-35$ has no common monomial factor $=(\ \ \ \ \ \ \ \ )(\ \ \ \ \ \ \ \ )$ $=(r\ \ \ \ \ \ )(r\ \ \ \ \ \ )$ $=(r+\ )(r-\ )$ The factors of -35 must have unlike signs. $=(r+5)(r-7)$ 5 and -7 have a sum of -2 and a product of -35.
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