Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 5 - Section 5.3 - Special Products - Exercise Set: 71

Answer

$70y^2+2y-12$

Work Step by Step

Using $(a+b)(c+d)=ab+ad+bc+bd$ or the FOIL Method, the product of the given expression, $ (7y+3)(10y-4) ,$ is \begin{array}{l}\require{cancel} 7y(10y)+7y(-4)+3(10y)+3(-4) \\\\= 70y^2-28y+30y-12 \\\\= 70y^2+2y-12 .\end{array}
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