Answer
$ad-bc$
Work Step by Step
The derivative of a 2x2 matrix is defined as the product of element $a_{11}*a_{22}-a_{12}*a_{21}$
That value, in this case, is $a*d-b*c$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 8 - Section 8.3 - Systems of Linear Equations: Determinants - 8.3 Assess Your Understanding - Page 581: 1
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