1. | 2x + 1 | - | x - 1 | = 3 Plss tolong jawab pakai cara bsk di kumpulin -_-

Question

Matematika Diposting : 2017-07-26 Diupdate : 2019-03-29 zahraainaya

Pertanyaan

1. | 2x + 1 | - | x - 1 | = 3

Plss tolong jawab pakai cara bsk di kumpulin -_-

Answer 1

2x + 1 - x + 1 = 3
x = 3-2 = 1

atau
2x + 1 -x +1 = -3
x = -5

Hp={-5,1}

Answer 2

|2x + 1| - |x - 1| = 3
2x + 1 - x + 1 = 3
x = 1

atau
-(2x + 1) - (-(x - 1)) = 3
-x = 5
x = -5

HP = {1,-5}