definisikan jika |2×+1|=5,nilai × yang memenuhi adalah..

| 2x+1 | = 5

x1 =
2x+1 = 5
2x = 5-1
2x = 4
x = 4/2
x = 2

atau

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