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x in (-oo:+oo)
4*x-(3*x^2) = 11/3 // - 11/3
4*x-(3*x^2)-(11/3) = 0
4*x-3*x^2-11/3 = 0
4*x-3*x^2-11/3 = 0
DELTA = 4^2-(-11/3*(-3)*4)
DELTA = -28
DELTA < 0
x belongs to the empty set
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