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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x = 3*x-14 // - 3*x-14
2/x-(3*x)+14 = 0
2/x-3*x+14 = 0
2*x^-1-3*x^1+14*x^0 = 0
(14*x^1-3*x^2+2*x^0)/(x^1) = 0 // * x^2
x^1*(14*x^1-3*x^2+2*x^0) = 0
x^1
14*x-3*x^2+2 = 0
14*x-3*x^2+2 = 0
DELTA = 14^2-(-3*2*4)
DELTA = 220
DELTA > 0
x = (220^(1/2)-14)/(-3*2) or x = (-220^(1/2)-14)/(-3*2)
x = (2*55^(1/2)-14)/(-6) or x = (-2*55^(1/2)-14)/(-6)
x in { (2*55^(1/2)-14)/(-6), (-2*55^(1/2)-14)/(-6)}
x in { (2*55^(1/2)-14)/(-6), (-2*55^(1/2)-14)/(-6) }
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