Answer
20, 20
Work Step by Step
Deleting the 1st row and column,
\[
M=
\left[ {\begin{array}{cc}
5 & 2 \\
0 & 4 \\
\end{array} } \right]
\]
$ad-bc= 20$
Multiplying by 1 gives us 20.
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 6, Matrices and Determinants - Section 6.4 - Determinants and Cramer's Rule - 6.4 Exercises - Page 533: 15
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