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x^2*((6*x^4-(12*x^2))/3) = 0
x^2*((6*x^4-12*x^2)/3) = 0
(x^2*(6*x^4-12*x^2))/3 = 0
6*x^4-12*x^2 = 0
6*x^2*(x^2-2) = 0
1*x^2 = 2 // : 1
x^2 = 2
x^2 = 2 // ^ 1/2
abs(x) = 2^(1/2)
x = 2^(1/2) or x = -2^(1/2)
6*x^2*(x-2^(1/2))*(x+2^(1/2)) = 0
(6*x^2*x^2*(x-2^(1/2))*(x+2^(1/2)))/3 = 0
( 6*x^2 )
6*x^2 = 0 // : 6
x^2 = 0
x = 0
( x+2^(1/2) )
x+2^(1/2) = 0 // - 2^(1/2)
x = -2^(1/2)
( x-2^(1/2) )
x-2^(1/2) = 0 // + 2^(1/2)
x = 2^(1/2)
( x^2 )
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in { 0, -2^(1/2), 2^(1/2), 0 }
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