Answer
$y^2-4y-21$
Work Step by Step
Using $(a+b)(c+d)=ab+ad+bc+bd$ or the FOIL Method, the product of the given expression, $
(y-7)(y+3)
,$ is
\begin{array}{l}\require{cancel}
y(y)+y(3)-7(y)-7(3)
\\\\=
y^2+3y-7y-21
\\\\=
y^2-4y-21
.\end{array}
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
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 - Page 367: 3
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