College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter R - Review Exercises - Page 75: 55



Work Step by Step

Using the $(a+b)(c+d)=ac+ad+bc+bd$ or the FOIL Method and the laws of exponents, the given expression, $ (8y-7)(2y+7) ,$ simplifies to \begin{array}{l}\require{cancel} 8y(2y)+8y(7)-7(2y)-7(7) \\\\= 16y^2+56y-14y-49 \\\\= 16y^2+42y-49 .\end{array}
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