[ 2 -2 ] [ 0 ]
-1 |-> -2
1 |-> 2
f(z) = -z^3 + 3*z
*
[ 1/2 -1/2 ] [ 0 ]
-1 |-> -1/2
1 |-> 1/2
f(z) = 2*z^3 - 3/2*z
*
TOTAL: 2