2 4*x + 7*x + 4
4*x^2 + 7*x + 4
2 4 + 4*x + 7*x
4 + 4*x^2 + 7*x
/ ____\ / ____\ | 7 I*\/ 15 | | 7 I*\/ 15 | |x + - + --------|*|x + - - --------| \ 8 8 / \ 8 8 /
(x + 7/8 + i*sqrt(15)/8)*(x + 7/8 - i*sqrt(15)/8)
4.0 + 4.0*x^2 + 7.0*x
4 + x*(7 + 4*x)