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D( x )
x^2-x-6 = 0
x^2-(7*x)+12 = 0
x^2-x-6 = 0
x^2-x-6 = 0
x^2-x-6 = 0
DELTA = (-1)^2-(-6*1*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)+1)/(1*2) or x = (1-25^(1/2))/(1*2)
x = 3 or x = -2
x^2-(7*x)+12 = 0
x^2-(7*x)+12 = 0
x^2-7*x+12 = 0
x^2-7*x+12 = 0
DELTA = (-7)^2-(1*4*12)
DELTA = 1
DELTA > 0
x = (1^(1/2)+7)/(1*2) or x = (7-1^(1/2))/(1*2)
x = 4 or x = 3
x in (-oo:-2) U (-2:3) U (3:4) U (4:+oo)
x/(x^2-x-6)-(x/(x^2-(7*x)+12)) = 0
x/(x^2-x-6)-(x/(x^2-7*x+12)) = 0
x/(x^2-x-6)+(-1*x)/(x^2-7*x+12) = 0
x^2-x-6 = 0
x^2-x-6 = 0
x^2-x-6 = 0
DELTA = (-1)^2-(-6*1*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)+1)/(1*2) or x = (1-25^(1/2))/(1*2)
x = 3 or x = -2
(x+2)*(x-3) = 0
x^2-7*x+12 = 0
x^2-7*x+12 = 0
x^2-7*x+12 = 0
DELTA = (-7)^2-(1*4*12)
DELTA = 1
DELTA > 0
x = (1^(1/2)+7)/(1*2) or x = (7-1^(1/2))/(1*2)
x = 4 or x = 3
(x-3)*(x-4) = 0
x/((x+2)*(x-3))+(-1*x)/((x-3)*(x-4)) = 0
x/((x+2)*(x-3))+(-1*x*(x+2))/((x+2)*(x-3)) = 0
x-1*x*(x+2) = 0
-x^2-x = 0
-x^2-x = 0
-x*(x+1) = 0
x+1 = 0 // - 1
x = -1
-x*(x+1) = 0
(-x*(x+1))/((x+2)*(x-3)) = 0
(-x*(x+1))/((x+2)*(x-3)) = 0 // * (x+2)*(x-3)
-x*(x+1) = 0
( -x )
-1*x = 0 // : -1
x = 0
( x+1 )
x+1 = 0 // - 1
x = -1
x in { 0, -1 }
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