Answer
$-68$
Work Step by Step
Substitute the given values of the variables to obtain:
$xy^2z-z
\\=2(-3)^2(-4)-(-4)
\\=2(9)(-4)+4
\\=-72+4
\\=-68$
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: 13
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