Answer
$-7$
Work Step by Step
Substitute the given values of the variables to obtain:
$xy-y^2-4x
\\=-2(3)-3^2-4(-2)
\\=-6-9-(-8)
\\=-6-9+8
\\=-15+8
\\=-7$
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 - Study Summary - Practice Exercises - Page 297: 28
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