SOLUTION: Let A=[1 3
2 9] , calculate A−1
What in the world do I do with this?! Please help!
Algebra.Com
Question 963090: Let A=[1 3
2 9] , calculate A−1
What in the world do I do with this?! Please help!
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
To find the inverse of a 2x2 matrix, first find the determinant.
For a 2x2 matrix,
the inverse is just,
So in this case,
.
.
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