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((12*x^2)/12)*x^2-(5*x^4)+2*x = 0
((12*x^2)/12)*x^2-5*x^4+2*x = 0
2*x-4*x^4 = 0
2*x*(1-2*x^3) = 0
-2*x^3 = -1 // : -2
x^3 = 1/2
x^3 = 1/2 // ^ 1/3
x = (1/2)^(1/3)
2*x = 0
2*x = 0 // : 2
x = 0
x in { (1/2)^(1/3), 0 }
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