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D( x )
x^2+8*x+12 = 0
x^2+8*x+12 = 0
x^2+8*x+12 = 0
x^2+8*x+12 = 0
DELTA = 8^2-(1*4*12)
DELTA = 16
DELTA > 0
x = (16^(1/2)-8)/(1*2) or x = (-16^(1/2)-8)/(1*2)
x = -2 or x = -6
x in (-oo:-6) U (-6:-2) U (-2:+oo)
(x^2-(6*x)-16)/(x^2+8*x+12) = 2 // - 2
(x^2-(6*x)-16)/(x^2+8*x+12)-2 = 0
(x^2-6*x-16)/(x^2+8*x+12)-2 = 0
x^2+8*x+12 = 0
x^2+8*x+12 = 0
x^2+8*x+12 = 0
DELTA = 8^2-(1*4*12)
DELTA = 16
DELTA > 0
x = (16^(1/2)-8)/(1*2) or x = (-16^(1/2)-8)/(1*2)
x = -2 or x = -6
(x+6)*(x+2) = 0
(x^2-6*x-16)/((x+6)*(x+2))-2 = 0
(x^2-6*x-16)/((x+6)*(x+2))+(-2*(x+6)*(x+2))/((x+6)*(x+2)) = 0
x^2-2*(x+6)*(x+2)-6*x-16 = 0
-x^2-22*x-40 = 0
-x^2-22*x-40 = 0
-1*(x^2+22*x+40) = 0
x^2+22*x+40 = 0
DELTA = 22^2-(1*4*40)
DELTA = 324
DELTA > 0
x = (324^(1/2)-22)/(1*2) or x = (-324^(1/2)-22)/(1*2)
x = -2 or x = -20
-1*(x+20)*(x+2) = 0
(-1*(x+20)*(x+2))/((x+6)*(x+2)) = 0
(-1*(x+20)*(x+2))/((x+6)*(x+2)) = 0 // * (x+6)*(x+2)
-1*(x+20)*(x+2) = 0
( x+20 )
x+20 = 0 // - 20
x = -20
( x+2 )
x+2 = 0 // - 2
x = -2
x in { -2}
x = -20
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