Answer
$8$
Work Step by Step
$\frac{1}{2}\cdot[8-(-8)]=\frac{1}{2}\cdot[8+8]=\frac{1}{2}\cdot16=8$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 6 - Matrices and Determinants - Exercise Set 6.2 - Page 611: 49
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