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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3*x-(3/x)-1 = (2*x)/x // - (2*x)/x
3*x-(3/x)-((2*x)/x)-1 = 0
3*x-3*x^-1-2-1 = 0
3*x^1-3*x^-1-3*x^0 = 0
(3*x^2-3*x^1-3*x^0)/(x^1) = 0 // * x^2
x^1*(3*x^2-3*x^1-3*x^0) = 0
x^1
3*x^2-3*x-3 = 0
3*x^2-3*x-3 = 0
DELTA = (-3)^2-(-3*3*4)
DELTA = 45
DELTA > 0
x = (45^(1/2)+3)/(2*3) or x = (3-45^(1/2))/(2*3)
x = (3*5^(1/2)+3)/6 or x = (3-3*5^(1/2))/6
x in { (3-3*5^(1/2))/6, (3*5^(1/2)+3)/6}
x in { (3-3*5^(1/2))/6, (3*5^(1/2)+3)/6 }
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