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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/2 = 2*x-(1/x) // - 2*x-(1/x)
1/x-(2*x)+3/2 = 0
1/x-2*x+3/2 = 0
1*x^-1-2*x^1+3/2*x^0 = 0
(3/2*x^1-2*x^2+1*x^0)/(x^1) = 0 // * x^2
x^1*(3/2*x^1-2*x^2+1*x^0) = 0
x^1
(3/2)*x-2*x^2+1 = 0
(3/2)*x-2*x^2+1 = 0
DELTA = (3/2)^2-(-2*1*4)
DELTA = 41/4
DELTA > 0
x = ((41/4)^(1/2)-(3/2))/(-2*2) or x = (-(3/2)-(41/4)^(1/2))/(-2*2)
x = ((41/4)^(1/2)-3/2)/(-4) or x = ((41/4)^(1/2)+3/2)/4
x in { ((41/4)^(1/2)-3/2)/(-4), ((41/4)^(1/2)+3/2)/4}
x in { ((41/4)^(1/2)-3/2)/(-4), ((41/4)^(1/2)+3/2)/4 }
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