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D( x )
x^2-(2*x)-24 = 0
x^2-(2*x)-24 = 0
x^2-(2*x)-24 = 0
x^2-2*x-24 = 0
x^2-2*x-24 = 0
DELTA = (-2)^2-(-24*1*4)
DELTA = 100
DELTA > 0
x = (100^(1/2)+2)/(1*2) or x = (2-100^(1/2))/(1*2)
x = 6 or x = -4
x in (-oo:-4) U (-4:6) U (6:+oo)
(x^2+8*x+16)/(x^2-(2*x)-24) = 0
(x^2+8*x+16)/(x^2-2*x-24) = 0
x^2+8*x+16 = 0
x^2+8*x+16 = 0
DELTA = 8^2-(1*4*16)
DELTA = 0
x = -8/(1*2)
x = -4 or x = -4
(x+4)^2 = 0
x^2-2*x-24 = 0
x^2-2*x-24 = 0
DELTA = (-2)^2-(-24*1*4)
DELTA = 100
DELTA > 0
x = (100^(1/2)+2)/(1*2) or x = (2-100^(1/2))/(1*2)
x = 6 or x = -4
(x+4)*(x-6) = 0
((x+4)^2)/((x+4)*(x-6)) = 0
x+4 = 0 // - 4
x = -4
x in { -4}
x belongs to the empty set
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