broyden: p=         2          2 
x=         2          2 
fx.norm=1.4142135623731
Dx=        -1         -1 
fz.norm=4.18987280137529E-09
good step, s=1
B=
         1   2.92e-10 
 -8.18e-10          1 
root=         1          1 
f(root)= -3.86e-09  -1.64e-09 
ncalls=5
newton: p=         2          2 
x=         2          2 
B=
         1          0 
         0          1 
Dx=        -1         -1 
good step, s=1
root=         1          1 
f(root)=  5.84e-10   5.84e-10 
ncalls=10