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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
11/x-2 = 3*x // - 3*x
11/x-(3*x)-2 = 0
11/x-3*x-2 = 0
11*x^-1-3*x^1-2*x^0 = 0
(11*x^0-3*x^2-2*x^1)/(x^1) = 0 // * x^2
x^1*(11*x^0-3*x^2-2*x^1) = 0
x^1
11-3*x^2-2*x = 0
11-3*x^2-2*x = 0
DELTA = (-2)^2-(-3*4*11)
DELTA = 136
DELTA > 0
x = (136^(1/2)+2)/(-3*2) or x = (2-136^(1/2))/(-3*2)
x = (2*34^(1/2)+2)/(-6) or x = (2-2*34^(1/2))/(-6)
x in { (2*34^(1/2)+2)/(-6), (2-2*34^(1/2))/(-6)}
x in { (2*34^(1/2)+2)/(-6), (2-2*34^(1/2))/(-6) }
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