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D( x )
x^2+3*x+2 = 0
x^2+6*x+9 = 0
x^2+3*x+2 = 0
x^2+3*x+2 = 0
x^2+3*x+2 = 0
DELTA = 3^2-(1*2*4)
DELTA = 1
DELTA > 0
x = (1^(1/2)-3)/(1*2) or x = (-1^(1/2)-3)/(1*2)
x = -1 or x = -2
x^2+6*x+9 = 0
x^2+6*x+9 = 0
x^2+6*x+9 = 0
DELTA = 6^2-(1*4*9)
DELTA = 0
x = -6/(1*2)
x = -3 or x = -3
x in (-oo:-3) U (-3:-2) U (-2:-1) U (-1:+oo)
(((x^2+5*x+6)/(x^2+6*x+9))*(x^2+7*x+12))/(x^2+3*x+2) = 0
((x^2+5*x+6)*(x^2+7*x+12))/((x^2+6*x+9)*(x^2+3*x+2)) = 0
x^2+5*x+6 = 0
x^2+5*x+6 = 0
DELTA = 5^2-(1*4*6)
DELTA = 1
DELTA > 0
x = (1^(1/2)-5)/(1*2) or x = (-1^(1/2)-5)/(1*2)
x = -2 or x = -3
(x+3)*(x+2) = 0
x^2+6*x+9 = 0
x^2+6*x+9 = 0
DELTA = 6^2-(1*4*9)
DELTA = 0
x = -6/(1*2)
x = -3 or x = -3
(x+3)^2 = 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 = (-1^(1/2)-7)/(1*2)
x = -3 or x = -4
(x+4)*(x+3) = 0
x^2+3*x+2 = 0
x^2+3*x+2 = 0
DELTA = 3^2-(1*2*4)
DELTA = 1
DELTA > 0
x = (1^(1/2)-3)/(1*2) or x = (-1^(1/2)-3)/(1*2)
x = -1 or x = -2
(x+2)*(x+1) = 0
((x+3)^2*(x+2)*(x+4))/((x+3)^2*(x+2)*(x+1)) = 0
( x+2 )
x+2 = 0 // - 2
x = -2
( x+3 )
x+3 = 0 // - 3
x = -3
( x+4 )
x+4 = 0 // - 4
x = -4
x in { -2}
x in { -3}
x = -4
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