2X2 Matrix inversion.

Sometimes it is needed to find the inverse of a simple 2x2 matrix. For this there is a simple method exitst , we don't have to apply any gauss jordan method or crammers etc.

The Matrix A = [  a00   a01  ]

               [  a10   a11  ]

then the inverse is        1          [  a11      -a01 ] 

                                  ---   x    [                     ]

                                 | A |       [ -a10      a00   ]

| A | is determinent of matrix A which is a00 * a11 - a10 * a01