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x in (-oo:+oo)
((4*x-x^2)^1)/2 = x/2 // - x/2
((4*x-x^2)^1)/2-(x/2) = 0
(4*x-x^2)/2-(x/2) = 0
(4*x-x^2)/2-x/2 = 0
4*x-x^2-x = 0
3*x-x^2 = 0
3*x-x^2 = 0
x*(3-x) = 0
3-x = 0 // - 3
-x = -3 // * -1
x = 3
x*(x-3) = 0
(x*(x-3))/2 = 0
(x*(x-3))/2 = 0 // * 2
x*(x-3) = 0
( x-3 )
x-3 = 0 // + 3
x = 3
( x )
x = 0
x in { 3, 0 }
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