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x*((3*x-(6*x^2))/3) = 0
x*((3*x-6*x^2)/3) = 0
(x*(3*x-6*x^2))/3 = 0
3*x-6*x^2 = 0
3*x*(1-2*x) = 0
1-2*x = 0 // - 1
-2*x = -1 // : -2
x = -1/(-2)
x = 1/2
3*x*(x-1/2) = 0
(3*x*x*(x-1/2))/3 = 0
( 3*x )
3*x = 0 // : 3
x = 0
( x-1/2 )
x-1/2 = 0 // + 1/2
x = 1/2
( x )
x = 0
x in { 0, 1/2, 0 }
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