Algebra 2 (1st Edition)

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

Chapter 12 Sequences and Series - Cumulative Review - Page 848: 14

Answer

117

Work Step by Step

Using the equation for a determinant, we find: $$\det \begin{pmatrix}a\:&\:b\:\\ c\:&\:d\:\end{pmatrix}\:=\:ad-bc \\ 12\cdot \:8-3\left(-7\right)=117$$
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