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