SOLUTION: Determine whether the matrix has an inverse. If an inverse exists, find it.
-1 - 1
2 3
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Question 116768: Determine whether the matrix has an inverse. If an inverse exists, find it.
-1 - 1
2 3
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
A matrix has an inverse if its determinant is not equal to zero.
For a 2x2 matrix,
The determinant is
In this case the determinant is
The inverse of a 2x2 matrix is given by,
In this case
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