step 1: x = [ 1 ; 1 ], error = 1.000e+00
step 2: x = [ 0 ; 3 ], error = 1.000e+00
step 3: x = [ 0.4 ; 2.8 ], error = 8.000e-01
step 4: x = [ 0.483870967741935; 1.99354838709677 ], error = 1.613e-02
step 5: x = [ 0.50009892401114 ; 1.99939860092483 ], error = 6.014e-04
step 6: x = [ 0.499999985726356; 1.99999999518732 ], error = 1.427e-08
step 7: x = [ 0.5 ; 2 ], error = 0.000e+00
step 8: x = [ 0.5 ; 2 ], error = 0.000e+00
step 9: x = [ 0.5 ; 2 ], error = 0.000e+00