tolong di bantu ya, beserta caranya

No 3&4 belum

1. C 2 karena mutlak (+)

2. *|2x + 1| = 5
2x + 1 = 5
2x = 5 - 1
2x = 4
X = 2
*-|2x + 1| = 5
-2x -1 = 5
-2x = 5+1
-2x = 6
X = -3
B -3 dan 2