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t in (-oo:+oo)
26/16 = t^2 // - t^2
26/16-t^2 = 0
-1*t^2 = -13/8 // : -1
t^2 = 13/8
t^2 = 13/8 // ^ 1/2
abs(t) = (13/8)^(1/2)
t = (13/8)^(1/2) or t = -(13/8)^(1/2)
t in { (13/8)^(1/2), -(13/8)^(1/2) }
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