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D( x )
x^2+12*x+32 = 0
x^2+12*x+32 = 0
x^2+12*x+32 = 0
x^2+12*x+32 = 0
DELTA = 12^2-(1*4*32)
DELTA = 16
DELTA > 0
x = (16^(1/2)-12)/(1*2) or x = (-16^(1/2)-12)/(1*2)
x = -4 or x = -8
x in (-oo:-8) U (-8:-4) U (-4:+oo)
(x^2-(8*x)+16)/(x^2+12*x+32) = 0
(x^2-8*x+16)/(x^2+12*x+32) = 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+12*x+32 = 0
x^2+12*x+32 = 0
DELTA = 12^2-(1*4*32)
DELTA = 16
DELTA > 0
x = (16^(1/2)-12)/(1*2) or x = (-16^(1/2)-12)/(1*2)
x = -4 or x = -8
(x+8)*(x+4) = 0
((x-4)^2)/((x+8)*(x+4)) = 0
x-4 = 0 // + 4
x = 4
x in { 4, 4 }
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