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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/x = (9/5)*x+2 // - (9/5)*x+2
3/x-((9/5)*x)-2 = 0
(-9/5)*x+3/x-2 = 0
3*x^-1-9/5*x^1-2*x^0 = 0
(3*x^0-9/5*x^2-2*x^1)/(x^1) = 0 // * x^2
x^1*(3*x^0-9/5*x^2-2*x^1) = 0
x^1
(-9/5)*x^2-2*x+3 = 0
(-9/5)*x^2-2*x+3 = 0
DELTA = (-2)^2-(3*4*(-9/5))
DELTA = 128/5
DELTA > 0
x = ((128/5)^(1/2)+2)/(2*(-9/5)) or x = (2-(128/5)^(1/2))/(2*(-9/5))
x = -5/18*((128/5)^(1/2)+2) or x = -5/18*(2-(128/5)^(1/2))
x in { -5/18*((128/5)^(1/2)+2), -5/18*(2-(128/5)^(1/2))}
x in { -5/18*((128/5)^(1/2)+2), -5/18*(2-(128/5)^(1/2)) }
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