SOLUTION: I am having trouble finding the determinant of the matrix [-1 2] [1 3] with the 1 and 3 directly under the -1 and 2, with one set of []. Any help is greatly appreciated. Than

Question 84137: I am having trouble finding the determinant of the matrix [-1 2] [1 3] with the 1 and 3 directly under the -1 and 2, with one set of []. Any help is greatly appreciated.
Thank you!

Found 2 solutions by venugopalramana, jim_thompson5910:
Answer by venugopalramana(3286) (Show Source): You can put this solution on YOUR website!
I am having trouble finding the determinant of the matrix [-1 2] [1 3] with the 1 and 3 directly under the -1 and 2, with one set of []. Any help is greatly appreciated.
Thank you!
-1,2
1,3
DETERMINANT =
(-1)(3)-(2)(1)=-3-2=-5
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
If you have a general 2x2 matrix

the determinant of that matrix is

So if we have this matrix

the determinant is

So the determinant is -5
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