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t in (-oo:+oo)
(12*t^2)/5+(19*t^1)/5+4 = 0
(12*t^2)/5+(19*t)/5+4 = 0
12/5*t^2+19/5*t+4 = 0
DELTA = (19/5)^2-(12/5*4*4)
DELTA = -599/25
DELTA < 0
t belongs to the empty set
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