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t in (-oo:+oo)
(3*t^2)/2-(1/4) = 0
(3*t^2)/2-1/4 = 0
3/2*t^2 = 1/4 // : 3/2
t^2 = 1/6
t^2 = 1/6 // ^ 1/2
abs(t) = (1/6)^(1/2)
t = (1/6)^(1/2) or t = -(1/6)^(1/2)
t in { (1/6)^(1/2), -(1/6)^(1/2) }
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