Test case -- Rootsolver (first example):

The error for root 1.0000000000000000 = 0.0000000000000000
The error for root 0.0000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
The error for root 0.5000000000000000 = 0.0000000000000000
