Tentukan himpunan penyelesaian berikut |14-5×|=2

Mapel : Matematika
Kelas : X SMA
Materi : Persamaan Nilai Mutlak

Pembahasan :
Cara 1

|14 - 5x| = 2

14 - 5x = 2
5x = 14 - 2
5x = 12
x = 12/5

14 - 5x = -2
5x = 14 + 2
5x = 16
x = 16/5

Hp : {12/5 , 16/5}

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Cara 2

|14 - 5x| = 2
(14 - 5x)² = 2²
(14 - 5x)² - 2² = 0
(14 - 5x + 2)(14 - 5x - 2) = 0
(16 - 5x)(12 - 5x) = 0
x = 16/5
x = 12/5

Hp : {12/5 , 16/5}