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D( x )
(2*x-x)^2 = 0
(2*x-x)^2 = 0
(2*x-x)^2 = 0
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
4.8 = (x^2)/((2*x-x)^2) // - (x^2)/((2*x-x)^2)
4.8-((x^2)/((2*x-x)^2)) = 0
(-1*x^2)/(x^2)+4.8 = 0
(-1*x^2)/(x^2)+(4.8*x^2)/(x^2) = 0
4.8*x^2-1*x^2 = 0
3.8*x^2 = 0
(3.8*x^2)/(x^2) = 0
(3.8*x^2)/(x^2) = 0 // * x^2
3.8*x^2 = 0
3.8*x^2 = 0 // : 3.8
x^2 = 0
x = 0
x in { 0}
x belongs to the empty set
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