Tentukan nilai x yang memenuhi persamaan |½x + 10| = 5
Jawaban Terkonfirmasi
Bab Nilai Mutlak
Matematika SMA Kelas X
|1/2 . x + 10| = 5
(1/2 . x + 10)² = 5²
(1/2 . x + 10)² – 5² = 0
(1/2 . x + 10 + 5) (1/2 . x + 10 – 5) = 0
(1/2 . x + 15) (1/2 . x + 5) = 0
1/2 . x + 15 = 0 atau 1/2 . x + 5 = 0
1/2 . x = -15 1/2 . x = -5
x = -30 x = -10
HP = { -30, -10 }