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(9*x^2)/3-((26*x^1)/3)-3 = 0
(9*x^2)/3+(-26/3)*x-3 = 0
3*x^2-26/3*x-3 = 0
DELTA = (-26/3)^2-(-3*3*4)
DELTA = 1000/9
DELTA > 0
x = ((1000/9)^(1/2)+26/3)/(2*3) or x = (26/3-(1000/9)^(1/2))/(2*3)
x = ((1000/9)^(1/2)+26/3)/6 or x = (26/3-(1000/9)^(1/2))/6
x in { (26/3-(1000/9)^(1/2))/6, ((1000/9)^(1/2)+26/3)/6 }
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