Answer
$$=28$$
Work Step by Step
Using Cramer's rule to find the determinant of the matrix, we obtain:
$$ \det \begin{pmatrix}3&-5\\ 2&6\end{pmatrix}\\ =3\cdot \:6-\left(-5\right)\cdot \:2\\ =28$$
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 8 - Systems of Linear Equations and Problem Solving - Study Summary - Practice Exercises - Page 569: 10
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