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