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x in (-oo:+oo)
2*x^(2/3)-(5*x^(1/3)) = 0
2*x^(2/3)-5*x^(1/3) = 0
t_1 = x^(1/3)
2*t_1^2-5*t_1^1 = 0
2*t_1^2-5*t_1 = 0
DELTA = (-5)^2-(0*2*4)
DELTA = 25
DELTA > 0
t_1 = (25^(1/2)+5)/(2*2) or t_1 = (5-25^(1/2))/(2*2)
t_1 = 5/2 or t_1 = 0
t_1 = 0
x^(1/3)+0 = 0
x^(1/3) = 0
1*x^(1/3) = 0 // : 1
x^(1/3) = 0
x = 0
t_1 = 5/2
x^(1/3)-5/2 = 0
1*x^(1/3) = 5/2 // : 1
x^(1/3) = 5/2
x^(1/3) = 5/2 // ^ 3
x = 125/8
x in { 0, 125/8 }
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