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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2*x-(3/x)-(4/6) = (7/3)*x // - (7/3)*x
2*x-((7/3)*x)-(3/x)-(4/6) = 0
2*x+(-7/3)*x-3*x^-1-2/3 = 0
-1/3*x^1-3*x^-1-2/3*x^0 = 0
(-1/3*x^2-2/3*x^1-3*x^0)/(x^1) = 0 // * x^2
x^1*(-1/3*x^2-2/3*x^1-3*x^0) = 0
x^1
(-1/3)*x^2+(-2/3)*x-3 = 0
(-1/3)*x^2+(-2/3)*x-3 = 0
DELTA = (-2/3)^2-(-3*4*(-1/3))
DELTA = -32/9
DELTA < 0
x in { }
x belongs to the empty set
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