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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2*x+3/x-3 = 5 // - 5
2*x+3/x-5-3 = 0
2*x^1+3*x^-1-8*x^0 = 0
(2*x^2-8*x^1+3*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^2-8*x^1+3*x^0) = 0
x^1
2*x^2-8*x+3 = 0
2*x^2-8*x+3 = 0
DELTA = (-8)^2-(2*3*4)
DELTA = 40
DELTA > 0
x = (40^(1/2)+8)/(2*2) or x = (8-40^(1/2))/(2*2)
x = (2*10^(1/2)+8)/4 or x = (8-2*10^(1/2))/4
x in { (8-2*10^(1/2))/4, (2*10^(1/2)+8)/4}
x in { (8-2*10^(1/2))/4, (2*10^(1/2)+8)/4 }
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