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