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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
5/x-2 = (9/3)*x-6 // - (9/3)*x-6
5/x-((9/3)*x)-2+6 = 0
5/x-3*x-2+6 = 0
5*x^-1-3*x^1+4*x^0 = 0
(4*x^1-3*x^2+5*x^0)/(x^1) = 0 // * x^2
x^1*(4*x^1-3*x^2+5*x^0) = 0
x^1
4*x-3*x^2+5 = 0
4*x-3*x^2+5 = 0
DELTA = 4^2-(-3*4*5)
DELTA = 76
DELTA > 0
x = (76^(1/2)-4)/(-3*2) or x = (-76^(1/2)-4)/(-3*2)
x = (2*19^(1/2)-4)/(-6) or x = (-2*19^(1/2)-4)/(-6)
x in { (2*19^(1/2)-4)/(-6), (-2*19^(1/2)-4)/(-6)}
x in { (2*19^(1/2)-4)/(-6), (-2*19^(1/2)-4)/(-6) }
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