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Verified answer
Kelas 10 MatematikaBab Persamaan Kuadrat
t² - t - 12
= t² 3t - 4t - 12
= t (t - 3) - 4 (t - 3)
= (t - 4) (t + 3)
jika sama dengan 0
(t - 4) (t + 3) = 0
t - 4 = 0
t = 4
t + 3 = 0
t = -3