/ 2/3 6 ___\ / 2/3 6 ___\
/ 2/3\ | 3 3*I*\/ 3 | | 3 3*I*\/ 3 |
1*\x - 3 /*|x + ---- + ---------|*|x + ---- - ---------|
\ 2 2 / \ 2 2 /
((1*(x - 3^(2/3)))*(x + (3^(2/3)/2 + 3*i*3^(1/6)/2)))*(x + (3^(2/3)/2 - 3*i*3^(1/6)/2))