3*(5*x - 4)*x - 4 - 8*x
3*(5*x - 1*4)*x - 1*4 - 8*x
2 -4 - 20*x + 15*x
-4 - 20*x + 15*x^2
/ ____\ / ____\ | 2 4*\/ 10 | | 2 4*\/ 10 | 1*|x + - - + --------|*|x + - - - --------| \ 3 15 / \ 3 15 /
(1*(x - (2/3 + 4*sqrt(10)/15)))*(x - (2/3 - 4*sqrt(10)/15))
-4.0 - 8.0*x + 3.0*x*(-4.0 + 5.0*x)