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D( x )
4*x-12 = 0
x-3 = 0
4*x-12 = 0
4*x-12 = 0
4*x-12 = 0 // + 12
4*x = 12 // : 4
x = 12/4
x = 3
x-3 = 0
x-3 = 0
x-3 = 0 // + 3
x = 3
x in (-oo:3) U (3:+oo)
8/(x-3)-(1/10) = 32/(4*x-12) // - 32/(4*x-12)
8/(x-3)-(32/(4*x-12))-(1/10) = 0
8/(x-3)-32*(4*x-12)^-1-1/10 = 0
8/(x-3)-32/(4*x-12)-1/10 = 0
(8*10*(4*x-12))/(10*(x-3)*(4*x-12))+(-32*10*(x-3))/(10*(x-3)*(4*x-12))+(-1*(x-3)*(4*x-12))/(10*(x-3)*(4*x-12)) = 0
8*10*(4*x-12)-32*10*(x-3)-1*(x-3)*(4*x-12) = 0
24*x-4*x^2-36 = 0
24*x-4*x^2-36 = 0
4*(6*x-x^2-9) = 0
6*x-x^2-9 = 0
DELTA = 6^2-(-9*(-1)*4)
DELTA = 0
x = -6/(-1*2)
x = 3 or x = 3
4*(x-3)^2 = 0
(4*(x-3)^2)/(10*(x-3)*(4*x-12)) = 0
(4*(x-3)^2)/(10*(x-3)*(4*x-12)) = 0 // * 10*(x-3)*(4*x-12)
4*(x-3)^2 = 0
x-3 = 0 // + 3
x = 3
x in { 3}
x belongs to the empty set
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