Answer
$16n^2-25$
Work Step by Step
RECALL:
$(a-b)(a+b) = a^2-b^2$
Use the formula above with $a=4n$ and $b=5$ to obtain:
$=(4n)^2-5^2
\\=16n^2-25$
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: 32
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