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t in (-oo:+oo)
3*t^2+(45/9)*t^2+24*t-(9*t)-108 = 0
3*t^2+(45/9)*t^2+24*t-9*t-108 = 0
8*t^2+15*t-108 = 0
DELTA = 15^2-(-108*4*8)
DELTA = 3681
DELTA > 0
t = (3681^(1/2)-15)/(2*8) or t = (-3681^(1/2)-15)/(2*8)
t = (3*409^(1/2)-15)/16 or t = (-3*409^(1/2)-15)/16
t in { (-3*409^(1/2)-15)/16, (3*409^(1/2)-15)/16 }
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