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t in (-oo:+oo)
32*(-1/2)*t^2+32*t+12 = 0
32*t-16*t^2+12 = 0
DELTA = 32^2-(-16*4*12)
DELTA = 1792
DELTA > 0
t = (1792^(1/2)-32)/(-16*2) or t = (-1792^(1/2)-32)/(-16*2)
t = (16*7^(1/2)-32)/(-32) or t = (-16*7^(1/2)-32)/(-32)
t in { (16*7^(1/2)-32)/(-32), (-16*7^(1/2)-32)/(-32) }
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