2 x + 6*x - 2
x^2 + 6*x - 2
2 -2 + x + 6*x
-2 + x^2 + 6*x
/ ____\ / ____\ \x + 3 - \/ 11 /*\x + 3 + \/ 11 /
(x + 3 - sqrt(11))*(x + 3 + sqrt(11))
-2 + x*(6 + x)
-2.0 + x^2 + 6.0*x