2 x + 6*x + 11
x^2 + 6*x + 11
2 11 + x + 6*x
11 + x^2 + 6*x
/ ___\ / ___\ \x + 3 + I*\/ 2 /*\x + 3 - I*\/ 2 /
(x + 3 + i*sqrt(2))*(x + 3 - i*sqrt(2))
11.0 + x^2 + 6.0*x
11 + x*(6 + x)