Answer
Expanding by cofactors
Work Step by Step
The method of finding the determinant of a square matrix of order 2$\times$2 or greater is called expanding by cofactors.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 10 - 10.4 - The Determinant of a Square Matrix - 10.4 Exercises - Page 742: 4
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