Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter R - Elementary Algebra Review - R.4 Polynomials - R.4 Exercise Set: 63

Answer

$42a^2-17ay-15y^2$

Work Step by Step

Using the FOIL method, the given expression, $ (6a-5y)(7a+3y) ,$ is equivalent to \begin{array}{l}\require{cancel} 6a(7a)+6a(3y)-5y(7a)-5y(3y) \\\\= 42a^2+18ay-35ay-15y^2 \\\\= 42a^2-17ay-15y^2 .\end{array}
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