Jawabanmu

2014-07-03T02:00:53+07:00
F(x) = 5/2 tx² -(9+2t)x - 1 dan x = -1
f(-1) = 0 ⇔ 5/2t - 2t - 9 = 0
            ⇔ 1/2 t = 9
                     t = 18
Nilai -t² = -(18)² = - 324