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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
16/x-(3*x) = 2 // - 2
16/x-(3*x)-2 = 0
16/x-3*x-2 = 0
16*x^-1-3*x^1-2*x^0 = 0
(16*x^0-3*x^2-2*x^1)/(x^1) = 0 // * x^2
x^1*(16*x^0-3*x^2-2*x^1) = 0
x^1
16-3*x^2-2*x = 0
16-3*x^2-2*x = 0
DELTA = (-2)^2-(-3*4*16)
DELTA = 196
DELTA > 0
x = (196^(1/2)+2)/(-3*2) or x = (2-196^(1/2))/(-3*2)
x = -8/3 or x = 2
x in { -8/3, 2}
x in { -8/3, 2 }
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