[ 0 1 ] [ 2 ] 
-2 |-> 0
-1 |-> 2
f(z) = 1/2*z^3 - 3/2*z + 1
*
[ -4/5 6/5 ] [ 4/5 ] 
2/5 |-> 6/5
-2/5 |-> 4/5
f(z) = -25/16*z^3 + 3/4*z + 1
*
TOTAL: 2