gauss-jordan method? 2x2 matrix

curby

I have to inverse a matrix via gauss-jordan method, showing my work. How do I do it?


4 2| 1 0
5 7| 0 1

thx

Marty81

http://en.wikipedia.org/wiki/Gaussian_elimination

and

http://en.wikipedia.org/wiki/Gauss%E2%80%93Jordan_elimination

curby

If I had any math background & knew wtf wikipedia is talking about, I would have used it.

Marty81

Check out the part about "Finding the inverse of a matrix." Basically you do elementary row operations until the left hand side is the identity matrix. The right side will then be the inverse of the matrix that started on the left side.