Answer
15
Work Step by Step
We evaluate the determinant of the matrix using Cramer's rule, which is listed on page 203. Doing this, we find:
$$\det \begin{pmatrix}3&-2\\ 6&1\end{pmatrix} \\ 3\cdot \:1-\left(-2\right)\cdot \:6 \\ 15$$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 3 Linear Systems and Matrices - 3.7 Evaluate Determinants and Apply Cramer's Rule - Guided Practice for Examples 1 and 2 - Page 204: 1
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