Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Appendix C - C - Vocabulary, Readiness & Video Check: 5



Work Step by Step

A 2x2 determinant can be calculated as $ad-bc$, where a is the upper-left entry, b is the upper-right entry, c is the lower-left entry, and d is the lower-right entry. Since the entry b is 0, the term bc will be 0. Therefore, the value of the determinant will be $ad=-2\times-10=20$
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