Q9 If A=
2 -3 5 3 2 -4 1 1 -2
,find A-1. Using A-1, solve the system of linear equations:
2x-3y+5z = 11, 3x + 2y -4z = -5, x+y-2z =-3.
Solution
,
,
2 | -3 | 5 |
3 | 2 | -4 |
1 | 1 | -2 |