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2*x^2*(x-(1/2))*(3*x+1/3) = 0
2*x^2*(x-1/2)*(3*x+1/3) = 0
( 2*x^2 )
2*x^2 = 0 // : 2
x^2 = 0
x = 0
( 3*x+1/3 )
3*x+1/3 = 0 // - 1/3
3*x = -1/3 // : 3
x = -1/3/3
x = -1/9
( x-1/2 )
x-1/2 = 0 // + 1/2
x = 1/2
x in { 0, -1/9, 1/2 }
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