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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(5/2)*x-(2/x) = 2 // - 2
(5/2)*x-(2/x)-2 = 0
(5/2)*x-2*x^-1-2 = 0
5/2*x^1-2*x^-1-2*x^0 = 0
(5/2*x^2-2*x^1-2*x^0)/(x^1) = 0 // * x^2
x^1*(5/2*x^2-2*x^1-2*x^0) = 0
x^1
(5/2)*x^2-2*x-2 = 0
(5/2)*x^2-2*x-2 = 0
DELTA = (-2)^2-(-2*4*(5/2))
DELTA = 24
DELTA > 0
x = (24^(1/2)+2)/(2*(5/2)) or x = (2-24^(1/2))/(2*(5/2))
x = (2*6^(1/2)+2)/5 or x = (2-2*6^(1/2))/5
x in { (2-2*6^(1/2))/5, (2*6^(1/2)+2)/5}
x in { (2-2*6^(1/2))/5, (2*6^(1/2)+2)/5 }
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