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(x^2)/3-((x^1)/3)-6 = 0
(x^2)/3-(x/3)-6 = 0
1/3*x^2-1/3*x-6 = 0
DELTA = (-1/3)^2-(-6*1/3*4)
DELTA = 73/9
DELTA > 0
x = ((73/9)^(1/2)+1/3)/(1/3*2) or x = (1/3-(73/9)^(1/2))/(1/3*2)
x = 3/2*((73/9)^(1/2)+1/3) or x = 3/2*(1/3-(73/9)^(1/2))
x in { 3/2*(1/3-(73/9)^(1/2)), 3/2*((73/9)^(1/2)+1/3) }
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