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X in (-oo:+oo)
1-((8/3)*X)+4 = 3*X^2+(5/3)*X+1 // - 3*X^2+(5/3)*X+1
1-(3*X^2)-((8/3)*X)-((5/3)*X)-1+4 = 0
(-8/3)*X-3*X^2+(-5/3)*X-1+1+4 = 0
4-3*X^2-13/3*X = 0
DELTA = (-13/3)^2-(-3*4*4)
DELTA = 601/9
DELTA > 0
X = ((601/9)^(1/2)+13/3)/(-3*2) or X = (13/3-(601/9)^(1/2))/(-3*2)
X = ((601/9)^(1/2)+13/3)/(-6) or X = (13/3-(601/9)^(1/2))/(-6)
X in { ((601/9)^(1/2)+13/3)/(-6), (13/3-(601/9)^(1/2))/(-6) }
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