3 2 z - 6*z + 21*z - 26
z^3 - 6*z^2 + 21*z - 26
3 2 -26 + z - 6*z + 21*z
-26 + z^3 - 6*z^2 + 21*z
(x - 2)*(x + -2 + 3*I)*(x + -2 - 3*I)
((x - 2)*(x - 2 + 3*i))*(x - 2 - 3*i)
-26.0 + z^3 + 21.0*z - 6.0*z^2
/ 2 \ (-2 + z)*\13 + z - 4*z/
(-2 + z)*(13 + z^2 - 4*z)
-26 + z*(21 + z*(-6 + z))