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((3*x)^2)/3+((4*x)^1)/3-4 = 0
((3*x)^2)/3+(4*x)/3-4 = 0
3*x^2+4/3*x-4 = 0
DELTA = (4/3)^2-(-4*3*4)
DELTA = 448/9
DELTA > 0
x = ((448/9)^(1/2)-4/3)/(2*3) or x = (-(448/9)^(1/2)-4/3)/(2*3)
x = ((448/9)^(1/2)-4/3)/6 or x = (-((448/9)^(1/2)+4/3))/6
x in { (-((448/9)^(1/2)+4/3))/6, ((448/9)^(1/2)-4/3)/6 }
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