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