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D( x )
4*x-6 = 0
2*x-3 = 0
4*x-6 = 0
4*x-6 = 0
4*x-6 = 0 // + 6
4*x = 6 // : 4
x = 6/4
x = 3/2
2*x-3 = 0
2*x-3 = 0
2*x-3 = 0 // + 3
2*x = 3 // : 2
x = 3/2
x in (-oo:3/2) U (3/2:+oo)
(3*x-1)/(2*x-3)-((x+9)/(4*x-6)) = 1 // - 1
(3*x-1)/(2*x-3)-((x+9)/(4*x-6))-1 = 0
(3*x-1)/(2*x-3)+(-1*(x+9))/(4*x-6)-1 = 0
((3*x-1)*(4*x-6))/((2*x-3)*(4*x-6))+(-1*(x+9)*(2*x-3))/((2*x-3)*(4*x-6))+(-1*(2*x-3)*(4*x-6))/((2*x-3)*(4*x-6)) = 0
(3*x-1)*(4*x-6)-1*(x+9)*(2*x-3)-1*(2*x-3)*(4*x-6) = 0
10*x^2-8*x^2-37*x+24*x-18+33 = 0
2*x^2-13*x+15 = 0
2*x^2-13*x+15 = 0
2*x^2-13*x+15 = 0
DELTA = (-13)^2-(2*4*15)
DELTA = 49
DELTA > 0
x = (49^(1/2)+13)/(2*2) or x = (13-49^(1/2))/(2*2)
x = 5 or x = 3/2
(x-3/2)*(x-5) = 0
((x-3/2)*(x-5))/((2*x-3)*(4*x-6)) = 0
((x-3/2)*(x-5))/((2*x-3)*(4*x-6)) = 0 // * (2*x-3)*(4*x-6)
(x-3/2)*(x-5) = 0
( x-3/2 )
x-3/2 = 0 // + 3/2
x = 3/2
( x-5 )
x-5 = 0 // + 5
x = 5
x in { 3/2}
x = 5
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