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D( x )
x-5 = 0
2*x-10 = 0
x-5 = 0
x-5 = 0
x-5 = 0 // + 5
x = 5
2*x-10 = 0
2*x-10 = 0
2*x-10 = 0 // + 10
2*x = 10 // : 2
x = 10/2
x = 5
x in (-oo:5) U (5:+oo)
5/(2*x-10)+2 = -6/(x-5) // + -6/(x-5)
5/(2*x-10)-(-6/(x-5))+2 = 0
5/(2*x-10)+6*(x-5)^-1+2 = 0
5/(2*x-10)+6/(x-5)+2 = 0
(5*(x-5))/((2*x-10)*(x-5))+(6*(2*x-10))/((2*x-10)*(x-5))+(2*(2*x-10)*(x-5))/((2*x-10)*(x-5)) = 0
5*(x-5)+6*(2*x-10)+2*(2*x-10)*(x-5) = 0
4*x^2+17*x-40*x-85+100 = 0
4*x^2-23*x+15 = 0
4*x^2-23*x+15 = 0
4*x^2-23*x+15 = 0
DELTA = (-23)^2-(4*4*15)
DELTA = 289
DELTA > 0
x = (289^(1/2)+23)/(2*4) or x = (23-289^(1/2))/(2*4)
x = 5 or x = 3/4
(x-3/4)*(x-5) = 0
((x-3/4)*(x-5))/((2*x-10)*(x-5)) = 0
((x-3/4)*(x-5))/((2*x-10)*(x-5)) = 0 // * (2*x-10)*(x-5)
(x-3/4)*(x-5) = 0
( x-3/4 )
x-3/4 = 0 // + 3/4
x = 3/4
( x-5 )
x-5 = 0 // + 5
x = 5
x in { 5}
x = 3/4
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