Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 10 - Systems of Equations and Inequalities - Chapter Review - Review Exercises - Page 815: 27

Answer

$108$

Work Step by Step

Let $A=\begin{vmatrix} 1 & 4 & 0\\ -1 & 2 & 6 \\ 4 & 1 & 3 \end{vmatrix}$, use the top row to expand, we have: $|A|=1[2(3)-6(1)]-4[-1(3)-6(4)]+0=1[0]-4[-27]=108$
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