Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 3 Linear Systems and Matrices - Chapter Test - Page 227: 24



Work Step by Step

Using Cramer's rule to find the determinant, we obtain: $$\det \begin{pmatrix}-4&5\\ 2&-1\end{pmatrix} \\ \left(-4\right)\left(-1\right)-5\cdot \:2 \\ -6$$
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