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n in (-oo:+oo)
(7/3)*n^2+24*n-((7/24)*n) = 0
(7/3)*n^2+24*n+(-7/24)*n = 0
7/3*n^2+569/24*n = 0
DELTA = (569/24)^2-(0*7/3*4)
DELTA = 323761/576
DELTA > 0
n = ((323761/576)^(1/2)-569/24)/(2*7/3) or n = (-(323761/576)^(1/2)-569/24)/(2*7/3)
n = 0 or n = -569/56
n in { -569/56, 0 }
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