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D( x )
4*x = 0
4*x = 0
4*x = 0
4*x = 0 // : 4
x = 0
x in (-oo:0) U (0:+oo)
(24*x)^2+(8*x)/(4*x) = 0
576*x^2 = -2 // : 576
x^2 = -1/288
x belongs to the empty set
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