2.|2x+1|=4 persamaan nilai mutlak

Mapel : Matematika
Kelas : X SMA
Bab : Mutak

Pembahasan :
Jika soal ↓
2|2x + 1| = 4
|2x + 1| = 2
(2x + 1)² = 2²
(2x + 1)² - 2² = 0
(2x + 3)(2x - 1) = 0
x = -3/2
x = 1/2

Hp : {-3/2 , 1/2}

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Jika soal ↓
|2x + 1| = 4
(2x + 1)² = 4²
(2x + 1)² - 4² = 0
(2x + 5)(2x - 3) = 0
x = -5/2
x = 3/2

Hp : {-5/2 , 3/2}