2 z - 2*z + 10
z^2 - 2*z + 10
(x + -1 + 3*I)*(x + -1 - 3*I)
(x - 1 + 3*i)*(x - 1 - 3*i)
2 10 + z - 2*z
10 + z^2 - 2*z
10.0 + z^2 - 2.0*z
10 + z*(-2 + z)