Answer
$85$
Work Step by Step
Substitute the given values of the variables to obtain:
$x^2+5y^2-4xy
\\=5^2+5(-2)^2-4(5)(-2)
\\=25+5(4)-(-40)
\\=25+20+40
\\=85$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 4 - Polynomials - 4.7 Polynomials in Several Variables - 4.7 Exercise Set - Page 283: 12
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