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D( x )
2*x^3-(8*x) = 0
2*x^3-(8*x) = 0
2*x^3-(8*x) = 0
2*x^3-8*x = 0
2*x^3-8*x = 0
2*x*(x^2-4) = 0
1*x^2 = 4 // : 1
x^2 = 4
x^2 = 4 // ^ 1/2
abs(x) = 2
x = 2 or x = -2
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:-2) U (-2:0) U (0:2) U (2:+oo)
(2*x^2-(4*x))/(2*x^3-(8*x)) = 0
(2*x^2-4*x)/(2*x^3-8*x) = 0
2*x^2-4*x = 0
2*x*(x-2) = 0
x-2 = 0 // + 2
x = 2
2*x*(x-2) = 0
2*x^3-8*x = 0
2*x*(x^2-4) = 0
1*x^2 = 4 // : 1
x^2 = 4
x^2 = 4 // ^ 1/2
abs(x) = 2
x = 2 or x = -2
2*x*(x-2)*(x+2) = 0
(2*x*(x-2))/(2*x*(x-2)*(x+2)) = 0
( 2*x )
2*x = 0 // : 2
x = 0
( x-2 )
x-2 = 0 // + 2
x = 2
x in { 0}
x in { 2}
x belongs to the empty set
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