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