tentukan nilai x dari persamaan berikut! 2|4x-3|=8

2 x | 4x - 3 | = 8
| 4x - 3 | = 4
4x - 3 = 4
4x = 4 + 3
x¹= 7/4

atau
| 4x - 3 | = 4
4x - 3 = -4
x² = - 1/4

Materi : Persamaan Mutlak

Pembahasan :
2|4x - 3| = 8
|4x - 3| = 4
(4x - 3)² = 4²
(4x - 3)² - 4² = 0
(4x - 3 + 4)(4x - 3 - 4) = 0
(4x + 1)(4x - 7) = 0
x = -1/4
x = 7/4

Hp : {-1/4 , 7/4}