College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 6 - Matrices and Determinants - Exercise Set 6.4 - Page 641: 94

Answer

6

Work Step by Step

$2(-5)-1(-4)=-10+4=-6$ $5(-5)-6(-4)=-25+24=-1$ $\displaystyle \frac{2(-5)-1(-4)}{5(-5)-6(-4)}=\frac{-6}{-1}=+6$
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