Algebra 2 (1st Edition)

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



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: $$\det \begin{pmatrix}3&-2\\ 6&1\end{pmatrix} \\ 3\cdot \:1-\left(-2\right)\cdot \:6 \\ 15$$
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