Answer
$-4$
Work Step by Step
Formula:
ad-bc
$(4*-1)-(5*0)$
$-4-0=-4$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 10 - Section 10.6 - Determinants and Cramer's Rule - 10.6 Exercises - Page 742: 9
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