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