# Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Soecial Cases - Practice and Problem-Solving Exercises - Page 508: 21

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

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