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