Elementary Algebra

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



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: $=(2n)^2-1^2 \\=4n^2-1$
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