Naïve Gauss elimination for 3 by 3 matrices Starting Matrix 1 2 3 1 A= 4 5 6 b= 7 7 8 -9 2 Step 1 1 2 3 1 0 -0.75 -1.5 b= 0.75 0 -0.85714 -4.28571 -0.71429 Step 2 1 2 3 1 0 -0.75 -1.5 b= 0.75 0 0 -2.25 -1.375 Verification x3= 0.611111 x2= -2.22222 -1.72222 0.777778 -0.05556 x1= 3.611111 A^(-1)= 1.444444 -0.55556 0.111111 -0.05556 0.111111 -0.05556
