2 - 4*x - 7*x - 8
-4*x^2 - 7*x - 8
/ ____\ / ____\ | 7 I*\/ 79 | | 7 I*\/ 79 | |x + - + --------|*|x + - - --------| \ 8 8 / \ 8 8 /
(x + 7/8 + i*sqrt(79)/8)*(x + 7/8 - i*sqrt(79)/8)
2 -8 - 7*x - 4*x
-8 - 7*x - 4*x^2
-8.0 - 4.0*x^2 - 7.0*x
-8 + x*(-7 - 4*x)