Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 9 - Polar Coordinates; Vectors - 9.7 The Cross Product - 9.7 Assess Your Understanding - Page 631: 8

Answer

$-4$

Work Step by Step

RECALL: $\begin{vmatrix} a & b \\ c & d \end{vmatrix}=ad-bc$ Use the definition above to obtain: $\begin{vmatrix} -2 & 5 \\ 2 & -3 \end{vmatrix}=(-2)(-3)-5\cdot2=6-10=-4$
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