2 x + 2*x + 4
x^2 + 2*x + 4
/ ___\ / ___\ \x + 1 + I*\/ 3 /*\x + 1 - I*\/ 3 /
(x + 1 + i*sqrt(3))*(x + 1 - i*sqrt(3))
2 4 + x + 2*x
4 + x^2 + 2*x
4.0 + x^2 + 2.0*x
4 + x*(2 + x)