Elementary Linear Algebra 7th Edition

Published by Cengage Learning
ISBN 10: 1-13311-087-8
ISBN 13: 978-1-13311-087-3

Chapter 3 - Determinants - Review Exercises - Page 140: 66

Answer

$24$

Work Step by Step

The area of the triangle is given by $$\pm\frac{1}{2} \left|\begin{array}{rrr}{-4} & {0} & {1} \\ {4} & {0} & {1} \\ {0} & {6} & {1}\end{array}\right|=\pm\frac{1}{2} (6)(-4-4)=24. $$
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