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x in (-oo:+oo)
(11/2)*x^2+120 = -27*x // + -27*x
(11/2)*x^2-(-27*x)+120 = 0
(11/2)*x^2+27*x+120 = 0
11/2*x^2+27*x+120 = 0
DELTA = 27^2-(4*11/2*120)
DELTA = -1911
DELTA < 0
x belongs to the empty set
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