Answer
$15x^4y^2$
Work Step by Step
Using the $(r+1)$th term of the binomial expansion, then the 3rd term of $(x-y)^6$ is
\begin{array}{l}
\dfrac{6!}{4!2!}x^4(-y)^2
\\\\=
15x^4y^2
.\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 11 - Cumulative Review - Page 670: 50
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