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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2 = x+2/x-3 // - x+2/x-3
2-x-(2/x)+3 = 0
2-x-2*x^-1+3 = 0
5*x^0-1*x^1-2*x^-1 = 0
(5*x^1-1*x^2-2*x^0)/(x^1) = 0 // * x^2
x^1*(5*x^1-1*x^2-2*x^0) = 0
x^1
5*x-x^2-2 = 0
5*x-x^2-2 = 0
DELTA = 5^2-(-2*(-1)*4)
DELTA = 17
DELTA > 0
x = (17^(1/2)-5)/(-1*2) or x = (-17^(1/2)-5)/(-1*2)
x = (17^(1/2)-5)/(-2) or x = (17^(1/2)+5)/2
x in { (17^(1/2)-5)/(-2), (17^(1/2)+5)/2}
x in { (17^(1/2)-5)/(-2), (17^(1/2)+5)/2 }
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