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(x^4)/3-((7*x^2)/3)+10 = 0
(x^4)/3+(-7/3)*x^2+10 = 0
1/3*x^4-7/3*x^2+10 = 0
t_1 = x^2
1/3*t_1^2-7/3*t_1^1+10 = 0
1/3*t_1^2-7/3*t_1+10 = 0
DELTA = (-7/3)^2-(1/3*4*10)
DELTA = -71/9
DELTA < 0
x belongs to the empty set
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