Answer
$2$
Work Step by Step
Using $n!=n(n-1)(n-2)\cdot\cdot\cdot(3)(2)(1)$ or the factorial of a number, the given expression, $
2!
,$ is equal to
\begin{array}{l}\require{cancel}
2(1)
\\\\=
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 - Section 11.5 - The Binomial Theorem - Vocabulary, Readiness & Video Check - Page 663: 4
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