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X in (-oo:+oo)
(X^2)/3-((6*X^1)/3)+5 = 0
(X^2)/3-2*X+5 = 0
1/3*X^2-2*X+5 = 0
DELTA = (-2)^2-(1/3*4*5)
DELTA = -8/3
DELTA < 0
X belongs to the empty set
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