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D( x )
x = 0
4*x+4/x-2 = 0
x = 0
x = 0
4*x+4/x-2 = 0
4*x+4/x-2 = 0
4*x^1+4*x^-1-2*x^0 = 0
(4*x^2-2*x^1+4*x^0)/(x^1) = 0 // * x^2
x^1*(4*x^2-2*x^1+4*x^0) = 0
x^1
4*x^2-2*x+4 = 0
4*x^2-2*x+4 = 0
DELTA = (-2)^2-(4*4*4)
DELTA = -60
DELTA < 0
x in { }
x in (-oo:0) U (0:+oo)
(6*x+6/7)/(4*x+4/x-2) = 0
(6*x+6/7)/(4*x+4*x^-1-2) = 0
4*x+4*x^-1-2 = 0
2*(2*x+2*x^-1-1) = 0
2*x^1+2*x^-1-1*x^0 = 0
(2*x^2-1*x^1+2*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^2-1*x^1+2*x^0) = 0
x^1
2*x^2-x+2 = 0
2*x^2-x+2 = 0
DELTA = (-1)^2-(2*2*4)
DELTA = -15
DELTA < 0
x in { }
2 = 0
(6*x+6/7)/2 = 0
6*x+6/7 = 0 // - 6/7
6*x = -6/7 // : 6
x = -6/7/6
x = -1/7
x = -1/7
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