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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
24/x = x/8 // - x/8
24/x-(x/8) = 0
24*x^-1-1/8*x^1 = 0
(24*x^0-1/8*x^2)/(x^1) = 0 // * x^2
x^1*(24*x^0-1/8*x^2) = 0
x^1
(-1/8)*x^2+24 = 0
(-1/8)*x^2+24 = 0
DELTA = 0^2-(4*24*(-1/8))
DELTA = 12
DELTA > 0
x = (12^(1/2)+0)/(2*(-1/8)) or x = (0-12^(1/2))/(2*(-1/8))
x = -8*3^(1/2) or x = 8*3^(1/2)
x in { -8*3^(1/2), 8*3^(1/2)}
x in { -8*3^(1/2), 8*3^(1/2) }
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