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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x-(2/x) = 5 // - 5
3*x-(2/x)-5 = 0
3*x-2*x^-1-5 = 0
3*x^1-2*x^-1-5*x^0 = 0
(3*x^2-5*x^1-2*x^0)/(x^1) = 0 // * x^2
x^1*(3*x^2-5*x^1-2*x^0) = 0
x^1
3*x^2-5*x-2 = 0
3*x^2-5*x-2 = 0
DELTA = (-5)^2-(-2*3*4)
DELTA = 49
DELTA > 0
x = (49^(1/2)+5)/(2*3) or x = (5-49^(1/2))/(2*3)
x = 2 or x = -1/3
x in { -1/3, 2}
x in { -1/3, 2 }
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