i need an easy way to teach to my Ss. to find the inverse of any matrics for ex.. A = (3 -4
1 -2)
1 -2)
Let A be the 2x2 matrix:
[ a b ]
[ c d ]
The inverse of A, say B, is defined by:
B = (1 / (ad-bc)) * [d -b]
B = (1 / (ad-bc)) * [-c a] (ignore the white text)
You may see the term the determinant used: given how A was described, it is ad-bc.
