2 z - 20*z + 104
z^2 - 20*z + 104
(x + -10 + 2*I)*(x + -10 - 2*I)
(x - 10 + 2*i)*(x - 10 - 2*i)
2 104 + z - 20*z
104 + z^2 - 20*z
104.0 + z^2 - 20.0*z
104 + z*(-20 + z)