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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
16/x-2 = 6*x // - 6*x
16/x-(6*x)-2 = 0
16/x-6*x-2 = 0
16*x^-1-6*x^1-2*x^0 = 0
(16*x^0-6*x^2-2*x^1)/(x^1) = 0 // * x^2
x^1*(16*x^0-6*x^2-2*x^1) = 0
x^1
16-6*x^2-2*x = 0
16-6*x^2-2*x = 0
DELTA = (-2)^2-(-6*4*16)
DELTA = 388
DELTA > 0
x = (388^(1/2)+2)/(-6*2) or x = (2-388^(1/2))/(-6*2)
x = (2*97^(1/2)+2)/(-12) or x = (2-2*97^(1/2))/(-12)
x in { (2*97^(1/2)+2)/(-12), (2-2*97^(1/2))/(-12)}
x in { (2*97^(1/2)+2)/(-12), (2-2*97^(1/2))/(-12) }
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