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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
8/x-((3/3)*x)-12+4 = 0
8/x-x-12+4 = 0
8*x^-1-1*x^1-8*x^0 = 0
(8*x^0-1*x^2-8*x^1)/(x^1) = 0 // * x^2
x^1*(8*x^0-1*x^2-8*x^1) = 0
x^1
8-x^2-8*x = 0
8-x^2-8*x = 0
DELTA = (-8)^2-(-1*4*8)
DELTA = 96
DELTA > 0
x = (96^(1/2)+8)/(-1*2) or x = (8-96^(1/2))/(-1*2)
x = (4*6^(1/2)+8)/(-2) or x = (8-4*6^(1/2))/(-2)
x in { (4*6^(1/2)+8)/(-2), (8-4*6^(1/2))/(-2)}
x in { (4*6^(1/2)+8)/(-2), (8-4*6^(1/2))/(-2) }
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