Tentukan nilai x |5x-6|=14

5x-6=14
5x=14+6
5x=20
x=20/5
x=4

Bab Nilai Mutlak
Mateamtika SMA Kelas X

|5x - 6| = 14

(5x - 6)² = 14²
(5x - 6)² - 14² = 0
(5x - 6 + 14) (5x - 6 - 14) = 0
(5x + 8) (5x - 20) = 0
5x + 8 = 0          atau          5x - 20 = 0
5x = -8                                5x = 20
x = -8/5                               x = 20/5
                                           x = 4

HP = { -8/5, 4 }