y=(3x-4)(2x-1)(x-2)
=3xx2xx1xx(x-4/3)(x-1/2)(x-2)
=6(x^3-(4/3+1/2+2)x^2+(4/3xx1/2+1/2xx2+2xx4/3)x-4/3xx1/2xx2)
4/3+1/2+2=(8/6+3/6+12/6)=(8+3+12)/6=23/6=69/18
4/3xx1/2+1/2xx2+2xx4/3=2/3+1+8/3=2/3+3/3+8/3
=(2+3+8)/3=13/3=26/6=78/18
4/3xx2/3xx2=(4xx2xx2)/(3xx3)=16/9=32/18
(3x-4)(2x-1)(x-2)=6(x^3-69/18x^2++78/18x-32/18)
y=6x^3-23x^2+26x-32/3