## Elementary Algebra

Published by Cengage Learning

# Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.1 - Numerical and Algebraic Expressions - Problem Set 1.1 - Page 7: 47

#### Answer

$=55$

#### Work Step by Step

We plug in the values for the variables that are given in the problem: $(x+y)(x-y)$ for $x = 8$, $y = 3$ $= (8+3)(8-3)$ $= 11(5)$ $= 55$

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