3 2 z - 9*z + 16*z + 26
z^3 - 9*z^2 + 16*z + 26
(x + 1)*(x + -5 + I)*(x + -5 - I)
((x + 1)*(x - 5 + i))*(x - 5 - i)
3 2 26 + z - 9*z + 16*z
26 + z^3 - 9*z^2 + 16*z
26 + z*(16 + z*(-9 + z))
26.0 + z^3 + 16.0*z - 9.0*z^2
/ 2 \ (1 + z)*\26 + z - 10*z/
(1 + z)*(26 + z^2 - 10*z)