Using the Newton tangent method equation f (x)=0, a real root, error no more than 0.000001

1) f (x)=(x - 1) - 3) (x (x - 2), the initial value respectively chosen x0=4 and x0=0

2) f (x)=1.1 x ^ 2 + x ^ 3 + 0.9 x - 1.4, the initial value chosen x0=1