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: 79

Answer

$(y+8)(y-9)$

Work Step by Step

$y^2-y-72$ has no common monomial factors. =$(\ \ \ \ \ \ \ \ \ )(\ \ \ \ \ \ \ \ \ )$ =$(y\ \ \ \ \ \ \ )(y\ \ \ \ \ \ \ )$ =$(y+\ \ )(y-\ \ )$ The factors of -72 must have unlike signs. =$(y+8)(y-9)$ 8 and -9 have a sum of -1 and a product of -72.
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