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D( x )
(x-1)^2 = 0
x-1 = 0
(x-1)^2 = 0
(x-1)^2 = 0
x-1 = 0 // + 1
x = 1
x-1 = 0
x-1 = 0
x-1 = 0 // + 1
x = 1
x in (-oo:1) U (1:+oo)
10/((x-1)^2)-(4/(x-1))-1 = 0
10/((x-1)^2)-4*(x-1)^-1-1 = 0
10/((x-1)^2)-4/(x-1)-1 = 0
10/((x-1)^2)+(-4*(x-1))/((x-1)^2)+(-1*(x-1)^2)/((x-1)^2) = 0
10-4*(x-1)-1*(x-1)^2 = 0
2*x-x^2-4*x-1+14 = 0
13-x^2-2*x = 0
13-x^2-2*x = 0
13-x^2-2*x = 0
DELTA = (-2)^2-(-1*4*13)
DELTA = 56
DELTA > 0
x = (56^(1/2)+2)/(-1*2) or x = (2-56^(1/2))/(-1*2)
x = (2*14^(1/2)+2)/(-2) or x = (2-2*14^(1/2))/(-2)
(x-((2*14^(1/2)+2)/(-2)))*(x-((2-2*14^(1/2))/(-2))) = 0
((x-((2*14^(1/2)+2)/(-2)))*(x-((2-2*14^(1/2))/(-2))))/((x-1)^2) = 0
((x-((2*14^(1/2)+2)/(-2)))*(x-((2-2*14^(1/2))/(-2))))/((x-1)^2) = 0 // * (x-1)^2
(x-((2*14^(1/2)+2)/(-2)))*(x-((2-2*14^(1/2))/(-2))) = 0
( x-((2*14^(1/2)+2)/(-2)) )
x-((2*14^(1/2)+2)/(-2)) = 0 // + (2*14^(1/2)+2)/(-2)
x = (2*14^(1/2)+2)/(-2)
( x-((2-2*14^(1/2))/(-2)) )
x-((2-2*14^(1/2))/(-2)) = 0 // + (2-2*14^(1/2))/(-2)
x = (2-2*14^(1/2))/(-2)
x in { (2*14^(1/2)+2)/(-2), (2-2*14^(1/2))/(-2) }
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