3 2 z + 3*z + z - 5
z^3 + 3*z^2 + z - 5
(x - 1)*(x + 2 + I)*(x + 2 - I)
((x - 1)*(x + 2 + i))*(x + 2 - i)
3 2 -5 + z + z + 3*z
-5 + z + z^3 + 3*z^2
/ 2 \ (-1 + z)*\5 + z + 4*z/
(-1 + z)*(5 + z^2 + 4*z)
-5 + z*(1 + z*(3 + z))
-5.0 + z + z^3 + 3.0*z^2