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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x-((2*x)/3)-2 = x-(3/3) // - x-(3/3)
2/x-((2*x)/3)-x+3/3-2 = 0
(-2/3)*x-x+2/x+3/3-2 = 0
2*x^-1-5/3*x^1-1*x^0 = 0
(2*x^0-5/3*x^2-1*x^1)/(x^1) = 0 // * x^2
x^1*(2*x^0-5/3*x^2-1*x^1) = 0
x^1
(-5/3)*x^2-x+2 = 0
(-5/3)*x^2-x+2 = 0
DELTA = (-1)^2-(2*4*(-5/3))
DELTA = 43/3
DELTA > 0
x = ((43/3)^(1/2)+1)/(2*(-5/3)) or x = (1-(43/3)^(1/2))/(2*(-5/3))
x = -3/10*((43/3)^(1/2)+1) or x = -3/10*(1-(43/3)^(1/2))
x in { -3/10*((43/3)^(1/2)+1), -3/10*(1-(43/3)^(1/2))}
x in { -3/10*((43/3)^(1/2)+1), -3/10*(1-(43/3)^(1/2)) }
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