2 2*x + 4*x + 5
2*x^2 + 4*x + 5
2 5 + 2*x + 4*x
5 + 2*x^2 + 4*x
/ ___\ / ___\ | I*\/ 6 | | I*\/ 6 | |x + 1 + -------|*|x + 1 - -------| \ 2 / \ 2 /
(x + 1 + i*sqrt(6)/2)*(x + 1 - i*sqrt(6)/2)
5.0 + 2.0*x^2 + 4.0*x
5 + 2*x*(2 + x)