products and subtract the upward products. Use this method to compute the following determinant. 1-3 -3 2-4 1-3 2-5 3- -3 2-4 [a11 12 13 11 12 321 322 323 321 322 a31 32 33 31 32

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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The expansion of a 3x3 determinant can be remembered by this device. Write a second copy of the first two columns to the right of the matrix, and compute the determinant by multiplying entries on six diagonals. Add the downward diagonal
products and subtract the upward products. Use this method to compute the following determinant.
1-3 5
2 -5 3
-3 2-4
1-3 5
2-5 3 =
2-4
G
a11 12 13
11 12
a21 22 23
21
22
231 232 233 231 232
Transcribed Image Text:The expansion of a 3x3 determinant can be remembered by this device. Write a second copy of the first two columns to the right of the matrix, and compute the determinant by multiplying entries on six diagonals. Add the downward diagonal products and subtract the upward products. Use this method to compute the following determinant. 1-3 5 2 -5 3 -3 2-4 1-3 5 2-5 3 = 2-4 G a11 12 13 11 12 a21 22 23 21 22 231 232 233 231 232
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