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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
6/x+2 = 2*x // - 2*x
6/x-(2*x)+2 = 0
6/x-2*x+2 = 0
6*x^-1-2*x^1+2*x^0 = 0
(2*x^1-2*x^2+6*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^1-2*x^2+6*x^0) = 0
x^1
2*x-2*x^2+6 = 0
2*x-2*x^2+6 = 0
DELTA = 2^2-(-2*4*6)
DELTA = 52
DELTA > 0
x = (52^(1/2)-2)/(-2*2) or x = (-52^(1/2)-2)/(-2*2)
x = (2*13^(1/2)-2)/(-4) or x = (-2*13^(1/2)-2)/(-4)
x in { (2*13^(1/2)-2)/(-4), (-2*13^(1/2)-2)/(-4)}
x in { (2*13^(1/2)-2)/(-4), (-2*13^(1/2)-2)/(-4) }
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