Answer
$-24$
Work Step by Step
We know that if a matrix is diagonal, its determinant equals the product of the diagonal entries, hence here: $D=3\cdot(-2)\cdot4=-24$
Linear Algebra: A Modern Introduction
by Poole, David
Published by
Cengage Learning
ISBN 10:
1285463242
ISBN 13:
978-1-28546-324-7
Chapter 4 - Eigenvalues and Eigenvectors - 4.2 Determinants - Exercises 4.2 - Page 282: 27
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