|7×-4×+3|=18 persamaan harga mutlak pelajaran kelas 1 SMA

Question

Matematika Diposting : 2017-07-23 Diupdate : 2021-08-17 winda584

Pertanyaan

|7×-4×+3|=18
persamaan harga mutlak
pelajaran kelas 1 SMA

Answer 1

|7x - 4x + 3| = 18
|3x + 3| = 18
|3x| = 18 - 3
x = 5

Answer 2

|7x - 4x + 3| = 18
|3x + 3| = 18
1) 3x + 3 = 18 => 3x = 15 => x = 5
2) 3x + 3 = -18 => 3x = -21 => x = -7
HP = {-7, 5}