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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x/8+2/x = 0
1/8*x^1+2*x^-1 = 0
(1/8*x^2+2*x^0)/(x^1) = 0 // * x^2
x^1*(1/8*x^2+2*x^0) = 0
x^1
(1/8)*x^2+2 = 0
(1/8)*x^2+2 = 0
DELTA = 0^2-(2*4*(1/8))
DELTA = -1
DELTA < 0
x in { }
x belongs to the empty set
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