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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6*x+29 = 5/x // - 5/x
6*x-(5/x)+29 = 0
6*x-5*x^-1+29 = 0
6*x^1-5*x^-1+29*x^0 = 0
(6*x^2+29*x^1-5*x^0)/(x^1) = 0 // * x^2
x^1*(6*x^2+29*x^1-5*x^0) = 0
x^1
6*x^2+29*x-5 = 0
6*x^2+29*x-5 = 0
DELTA = 29^2-(-5*4*6)
DELTA = 961
DELTA > 0
x = (961^(1/2)-29)/(2*6) or x = (-961^(1/2)-29)/(2*6)
x = 1/6 or x = -5
x in { -5, 1/6}
x in { -5, 1/6 }
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