jika |2× + 1 | = 5. Tentukan nilai x yang memenuhi persamaan tersebut

Kelas 10 Matematika
Bab Nilai Mutlak

|2x + 1| = 5

2x + 1 = 5
2x = 5 - 1
x = 4/2
x = 2

2x + 1 = -5
2x = -5 - 1
x = -6/2
x = -3

{ -3, 2}

2 x + 1 = 5
2x = 5 - 1
2x = 4
x = 4/2
x = 2

pembuktian


2x + 1 = 5
4 + 1 = 5