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x in (-oo:+oo)
(x^2)/3-((3*x^4)/3) = 0
(x^2)/3-x^4 = 0
1/3*x^2-x^4 = 0
t_1 = x^2
1/3*t_1^1-1*t_1^2 = 0
1/3*t_1-t_1^2 = 0
DELTA = (1/3)^2-(-1*0*4)
DELTA = 1/9
DELTA > 0
t_1 = ((1/9)^(1/2)-1/3)/(-1*2) or t_1 = (-(1/9)^(1/2)-1/3)/(-1*2)
t_1 = 0 or t_1 = 1/3
t_1 = 0
x^2+0 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
t_1 = 1/3
x^2-1/3 = 0
1*x^2 = 1/3 // : 1
x^2 = 1/3
x^2 = 1/3 // ^ 1/2
abs(x) = (1/3)^(1/2)
x = (1/3)^(1/2) or x = -(1/3)^(1/2)
x in { 0, (1/3)^(1/2), -(1/3)^(1/2) }
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