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D( x )
2*x-2 = 0
(x^2+12*x+36)/(x^2+5*x-6) = 0
x^2+5*x-6 = 0
2*x-2 = 0
2*x-2 = 0
2*x-2 = 0 // + 2
2*x = 2 // : 2
x = 2/2
x = 1
(x^2+12*x+36)/(x^2+5*x-6) = 0
(x^2+12*x+36)/(x^2+5*x-6) = 0
x^2+12*x+36 = 0
x^2+12*x+36 = 0
DELTA = 12^2-(1*4*36)
DELTA = 0
x = -12/(1*2)
x = -6 or x = -6
(x+6)^2 = 0
x^2+5*x-6 = 0
x^2+5*x-6 = 0
DELTA = 5^2-(-6*1*4)
DELTA = 49
DELTA > 0
x = (49^(1/2)-5)/(1*2) or x = (-49^(1/2)-5)/(1*2)
x = 1 or x = -6
(x+6)*(x-1) = 0
((x+6)^2)/((x+6)*(x-1)) = 0
x+6 = 0 // - 6
x = -6
x^2+5*x-6 = 0
x^2+5*x-6 = 0
x^2+5*x-6 = 0
DELTA = 5^2-(-6*1*4)
DELTA = 49
DELTA > 0
x = (49^(1/2)-5)/(1*2) or x = (-49^(1/2)-5)/(1*2)
x = 1 or x = -6
x in (-oo:-6) U (-6:1) U (1:+oo)
((x^2-36)/(2*x-2))/((x^2+12*x+36)/(x^2+5*x-6)) = 0
((x^2-36)*(x^2+5*x-6))/((2*x-2)*(x^2+12*x+36)) = 0
x^2+12*x+36 = 0
x^2+12*x+36 = 0
DELTA = 12^2-(1*4*36)
DELTA = 0
x = -12/(1*2)
x = -6 or x = -6
(x+6)^2 = 0
x^2+5*x-6 = 0
x^2+5*x-6 = 0
DELTA = 5^2-(-6*1*4)
DELTA = 49
DELTA > 0
x = (49^(1/2)-5)/(1*2) or x = (-49^(1/2)-5)/(1*2)
x = 1 or x = -6
(x+6)*(x-1) = 0
((x^2-36)*(x+6)*(x-1))/((2*x-2)*(x+6)^2) = 0
( x+6 )
x+6 = 0 // - 6
x = -6
( x-1 )
x-1 = 0 // + 1
x = 1
( x^2-36 )
1*x^2 = 36 // : 1
x^2 = 36
x^2 = 36 // ^ 1/2
abs(x) = 6
x = 6 or x = -6
x in { -6}
x in { 1}
x in { -6}
x = 6
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