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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2*x-(3/x)-((4*x)/x)-5+5 = 6 // - 6
2*x-(3/x)-((4*x)/x)-6-5+5 = 0
2*x-3*x^-1-6-5-4+5 = 0
2*x^1-3*x^-1-10*x^0 = 0
(2*x^2-10*x^1-3*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^2-10*x^1-3*x^0) = 0
x^1
2*x^2-10*x-3 = 0
2*x^2-10*x-3 = 0
DELTA = (-10)^2-(-3*2*4)
DELTA = 124
DELTA > 0
x = (124^(1/2)+10)/(2*2) or x = (10-124^(1/2))/(2*2)
x = (2*31^(1/2)+10)/4 or x = (10-2*31^(1/2))/4
x in { (10-2*31^(1/2))/4, (2*31^(1/2)+10)/4}
x in { (10-2*31^(1/2))/4, (2*31^(1/2)+10)/4 }
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