2 x + 3*x + 4
x^2 + 3*x + 4
/ ___\ / ___\ | 3 I*\/ 7 | | 3 I*\/ 7 | |x + - + -------|*|x + - - -------| \ 2 2 / \ 2 2 /
(x + 3/2 + i*sqrt(7)/2)*(x + 3/2 - i*sqrt(7)/2)
2 4 + x + 3*x
4 + x^2 + 3*x
4 + x*(3 + x)
4.0 + x^2 + 3.0*x