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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
24*x-(216/x)-6 = 0
24*x-216*x^-1-6 = 0
24*x^1-216*x^-1-6*x^0 = 0
(24*x^2-6*x^1-216*x^0)/(x^1) = 0 // * x^2
x^1*(24*x^2-6*x^1-216*x^0) = 0
x^1
24*x^2-6*x-216 = 0
24*x^2-6*x-216 = 0
DELTA = (-6)^2-(-216*4*24)
DELTA = 20772
DELTA > 0
x = (20772^(1/2)+6)/(2*24) or x = (6-20772^(1/2))/(2*24)
x = (6*577^(1/2)+6)/48 or x = (6-6*577^(1/2))/48
x in { (6-6*577^(1/2))/48, (6*577^(1/2)+6)/48}
x in { (6-6*577^(1/2))/48, (6*577^(1/2)+6)/48 }
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