Step-by-step explanation:
6x(x+3)(x-2)
6x(x^2+3x-2x-6)
6x(x^2+x-6)
6x^3+6x^2-36x
3(x-2/x+9)
3x-6/x+27
3x^2/x-6/x+27
(3x^2-6)/x+27
(3x^2-6)/x+27x/x
(3x^2-6+27x)/x
0*2x=0
x-3=x-3
2x=2x
x-9=x-9