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x in (-oo:+oo)
(3*x^2)/3-((2*x^1)/2)-8 = 0
(3*x^2)/3-x-8 = 0
x^2-x-8 = 0
DELTA = (-1)^2-(-8*1*4)
DELTA = 33
DELTA > 0
x = (33^(1/2)+1)/(1*2) or x = (1-33^(1/2))/(1*2)
x = (33^(1/2)+1)/2 or x = (1-33^(1/2))/2
x in { (1-33^(1/2))/2, (33^(1/2)+1)/2 }
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