## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson

# Chapter 4 - Polynomials - 4.7 Polynomials in Several Variables - 4.7 Exercise Set: 12

#### Answer

$85$

#### Work Step by Step

Substitute the given values of the variables to obtain: $x^2+5y^2-4xy \\=5^2+5(-2)^2-4(5)(-2) \\=25+5(4)-(-40) \\=25+20+40 \\=85$

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