2 x - 6*x + 10
x^2 - 6*x + 10
(x + -3 + I)*(x + -3 - I)
(x - 3 + i)*(x - 3 - i)
2 10 + x - 6*x
10 + x^2 - 6*x
10.0 + x^2 - 6.0*x
10 + x*(-6 + x)