Please help me with the two q's! Thx!
2 -4 -2
3 2 3 Divide R1 by 2
1 - 2 -1
3 2 3 Multiply R1 by - 3, add to R2
0 8 6 Multiply R2 by 1/8
0 1 3/4 Multiply R2 by 2, add to R1
1 0 1/2
0 1 3/4
Read the last column down (x , y) = ( 1/2, 3/4)
The inverse of the matrix is given by :
1 2 6
_________ -3 4
4*2 - (-6)*3
8 + 18
__________ -3 4
26
1/13 3/13
-3/26 2.13