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(5*x^2)/3-((14*x^1)/3)-3 = 0
(5*x^2)/3+(-14/3)*x-3 = 0
5/3*x^2-14/3*x-3 = 0
DELTA = (-14/3)^2-(-3*5/3*4)
DELTA = 376/9
DELTA > 0
x = ((376/9)^(1/2)+14/3)/(5/3*2) or x = (14/3-(376/9)^(1/2))/(5/3*2)
x = 3/10*((376/9)^(1/2)+14/3) or x = 3/10*(14/3-(376/9)^(1/2))
x in { 3/10*(14/3-(376/9)^(1/2)), 3/10*((376/9)^(1/2)+14/3) }
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