Answer
6241
Work Step by Step
$79^{2}$ can be written as $(80-1)^{2}$
We use the following formula:
$(a-b)^{2}$=$a^{2}$-2ab+$b^{2}$
Plug in the values: $80^{2}$-2(80)(1)+$1^{2}$
Simplify: 6400-160+16241
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Soecial Cases - Practice and Problem-Solving Exercises - Page 508: 21
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