Answer
$4n^2-1$
Work Step by Step
RECALL:
$(a+b)(a-b) = a^2-b^2$
Use the formula above with $a=2n$ and $b=1$ to obtain:
$=(2n)^2-1^2
\\=4n^2-1$
Elementary Algebra
by Kaufmann, Jerome; Schwitters, Karen;
Published by
Cengage Learning
ISBN 10:
1285194055
ISBN 13:
978-1-28519-405-9
Chapter 5 - Exponents and Polynomials - Chapter 5 Review Problem Set - Page 231: 31
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