halo 88 b nilai t jika luas EFGD = 88 cm². 4t² - 10t + 4 = 88. 4t² - 10t + 4 - 88 = 0. 4t² - 10t - 84 = 0. = 0. • 2t + 7 = 0. 2t = -7.. Halo Unlimited Rp - kuota unlimited 10 GB, kuota roaming 100 MB, bonus telepon 60 menit dan 100 SMS ke semua operator, akses ke aplikasi
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