SOLUTION: Please help me find the determinant of the matrix [-1 2 1 3]

Question 375284: Please help me find the determinant of the matrix [-1 2
1 3]
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Solved by pluggable solver: Finding the Determinant of a 2x2 Matrix

If you have the general 2x2 matrix:

the determinant is:

So this means that

Note: the vertical bars denote a determinant.

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So in this case the determinant of is:

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Answer:

So which means that the determinant of the matrix is -5

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