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x in (-oo:+oo)
(2*x^3)/2-((x^6)/8) = 0
x^3-1/8*x^6 = 0
t_1 = x^3
1*t_1^1-1/8*t_1^2 = 0
t_1-1/8*t_1^2 = 0
DELTA = 1^2-(-1/8*0*4)
DELTA = 1
DELTA > 0
t_1 = (1^(1/2)-1)/(-1/8*2) or t_1 = (-1^(1/2)-1)/(-1/8*2)
t_1 = 0 or t_1 = 8
t_1 = 0
x^3+0 = 0
x^3 = 0
1*x^3 = 0 // : 1
x^3 = 0
x = 0
t_1 = 8
x^3-8 = 0
1*x^3 = 8 // : 1
x^3 = 8
x^3 = 8 // ^ 1/3
x = 2
x in { 0, 2 }
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