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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
X-(2/x) = x-(4/x)-6 // - x-(4/x)-6
X-x-(2/x)+4/x+6 = 0
X-x-2*x^-1+4/x+6 = 0
2*x^-1-1*x^1+6*x^0 = 0
(6*x^1-1*x^2+2*x^0)/(x^1) = 0 // * x^2
x^1*(6*x^1-1*x^2+2*x^0) = 0
x^1
6*x-x^2+2 = 0
6*x-x^2+2 = 0
DELTA = 6^2-(-1*2*4)
DELTA = 44
DELTA > 0
x = (44^(1/2)-6)/(-1*2) or x = (-44^(1/2)-6)/(-1*2)
x = (2*11^(1/2)-6)/(-2) or x = (-2*11^(1/2)-6)/(-2)
x in { (2*11^(1/2)-6)/(-2), (-2*11^(1/2)-6)/(-2)}
x in { (2*11^(1/2)-6)/(-2), (-2*11^(1/2)-6)/(-2) }
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