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n in (-oo:+oo)
(7/3)*n^2+24*n-((7/2)*n) = 0
(7/3)*n^2+24*n+(-7/2)*n = 0
7/3*n^2+41/2*n = 0
DELTA = (41/2)^2-(0*7/3*4)
DELTA = 1681/4
DELTA > 0
n = ((1681/4)^(1/2)-41/2)/(2*7/3) or n = (-(1681/4)^(1/2)-41/2)/(2*7/3)
n = 0 or n = -123/14
n in { -123/14, 0 }
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