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(x^2)/3-((4*x^1)/3)-5 = 0
(x^2)/3+(-4/3)*x-5 = 0
1/3*x^2-4/3*x-5 = 0
DELTA = (-4/3)^2-(-5*1/3*4)
DELTA = 76/9
DELTA > 0
x = ((76/9)^(1/2)+4/3)/(1/3*2) or x = (4/3-(76/9)^(1/2))/(1/3*2)
x = 3/2*((76/9)^(1/2)+4/3) or x = 3/2*(4/3-(76/9)^(1/2))
x in { 3/2*(4/3-(76/9)^(1/2)), 3/2*((76/9)^(1/2)+4/3) }
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