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D( x )
6*x-x^3 = 0
6*x-x^3 = 0
6*x-x^3 = 0
6*x-x^3 = 0
x*(6-x^2) = 0
-1*x^2 = -6 // : -1
x^2 = 6
x^2 = 6 // ^ 1/2
abs(x) = 6^(1/2)
x = 6^(1/2) or x = -6^(1/2)
x = 0
x = 0
x in (-oo:-6^(1/2)) U (-6^(1/2):0) U (0:6^(1/2)) U (6^(1/2):+oo)
(2-x^2)/(6*x-x^3) = 0
6*x-x^3 = 0
x*(6-x^2) = 0
-1*x^2 = -6 // : -1
x^2 = 6
x^2 = 6 // ^ 1/2
abs(x) = 6^(1/2)
x = 6^(1/2) or x = -6^(1/2)
x*(x-6^(1/2))*(x+6^(1/2)) = 0
(2-x^2)/(x*(x-6^(1/2))*(x+6^(1/2))) = 0
-1*x^2 = -2 // : -1
x^2 = 2
x^2 = 2 // ^ 1/2
abs(x) = 2^(1/2)
x = 2^(1/2) or x = -2^(1/2)
x in { 2^(1/2), -2^(1/2) }
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