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x^2*((4*x^3-(12*x^2))/8) = 0
x^2*((4*x^3-12*x^2)/8) = 0
(x^2*(4*x^3-12*x^2))/8 = 0
4*x^3-12*x^2 = 0
4*x^2*(x-3) = 0
x-3 = 0 // + 3
x = 3
4*x^2*(x-3) = 0
(4*x^2*x^2*(x-3))/8 = 0
( 4*x^2 )
4*x^2 = 0 // : 4
x^2 = 0
x = 0
( x-3 )
x-3 = 0 // + 3
x = 3
( x^2 )
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in { 0, 3, 0 }
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