multiply row three by
Then use it to get the zero's above it.
So I'm trying to find the inverse of the matrix:
[2 4 2]
[2 5 2]
[0 2 -1]
I've gotten up to this bit:
[1 0 5 | -1/2 -2 0]
[0 1 -2| 1/2 1 0]
[0 0 -3| 1 2 -1]
I can't figure out how to get a 1 on the bottom right corner or the remaining two 0's. Help would be appreciated!