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(x^2)/3-((5*x^1)/3)+6 = 0
(x^2)/3+(-5/3)*x+6 = 0
1/3*x^2-5/3*x+6 = 0
DELTA = (-5/3)^2-(1/3*4*6)
DELTA = -47/9
DELTA < 0
x belongs to the empty set
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