Tolongg bantu dongg plss buat bsk !! 1. | 2x -1 | = 3. ( pendefinisian ) 2. | 3x + 2 | = | x-2 | . ( pendefinisian ) Tolong pake cara ya !! ( ini tentang

Nilai Mutlak

1) |2x - 1| = 3
jika 2x -1 ≥ 0 --> x  ≥  1/2
2x - 1 = 3
2x = 4
x   = 2

jika 2x -1 < 0 --> x  < 1/2
-(2x -1) = 3
2x - 1 = - 3
2x = - 2
x = - 1
...
2)
|3x  +2| = | x- 2|

jika 3x +2 ≥ 0  atau  x - 2 ≥0
3x + 2 = x - 2
2x = - 4
x = -2

jika 3x +2 ≥ 0 atau x - 2 < 0
3x  + 2 = -(x  -2)
3x + 2 = -x + 2
4x = 0
x = 0

jika 3x+2 < 0 atau x - 2 < 0
-(3x+2)  = -(x - 2)
-3x - 2 = -x + 2
- 2x = 4
x = - 2

HP x = { 0, -2)