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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
x+2/3 = 8/x-3 // - 8/x-3
x-(8/x)+2/3+3 = 0
x-8*x^-1+2/3+3 = 0
1*x^1-8*x^-1+11/3*x^0 = 0
(1*x^2+11/3*x^1-8*x^0)/(x^1) = 0 // * x^2
x^1*(1*x^2+11/3*x^1-8*x^0) = 0
x^1
x^2+(11/3)*x-8 = 0
x^2+(11/3)*x-8 = 0
DELTA = (11/3)^2-(-8*1*4)
DELTA = 409/9
DELTA > 0
x = ((409/9)^(1/2)-(11/3))/(1*2) or x = (-(11/3)-(409/9)^(1/2))/(1*2)
x = ((409/9)^(1/2)-11/3)/2 or x = (-((409/9)^(1/2)+11/3))/2
x in { (-((409/9)^(1/2)+11/3))/2, ((409/9)^(1/2)-11/3)/2}
x in { (-((409/9)^(1/2)+11/3))/2, ((409/9)^(1/2)-11/3)/2 }
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