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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(6/5)*x-3/x = 3 // - 3
(6/5)*x-3/x-3 = 0
6/5*x^1-3*x^-1-3*x^0 = 0
(6/5*x^2-3*x^1-3*x^0)/(x^1) = 0 // * x^2
x^1*(6/5*x^2-3*x^1-3*x^0) = 0
x^1
(6/5)*x^2-3*x-3 = 0
(6/5)*x^2-3*x-3 = 0
DELTA = (-3)^2-(-3*4*(6/5))
DELTA = 117/5
DELTA > 0
x = ((117/5)^(1/2)+3)/(2*(6/5)) or x = (3-(117/5)^(1/2))/(2*(6/5))
x = 5/12*((117/5)^(1/2)+3) or x = 5/12*(3-(117/5)^(1/2))
x in { 5/12*(3-(117/5)^(1/2)), 5/12*((117/5)^(1/2)+3)}
x in { 5/12*(3-(117/5)^(1/2)), 5/12*((117/5)^(1/2)+3) }
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