Question 582843
{{{-3x^3+54x=21x^2}}}

{{{-3x^3-21x^2+54x=0}}}

-3x(x^2+7x-18)=0


-3x(x^2+9x-2x-18)=0

(-3x)(x(x+9)-2(x+9))=0



-3x(x+9)(x-2))=0

Either

-3x= 0 , x=0
OR

X+=0 x=-9
OR
x-2=0
x=2

x= 0, 2,-9