2/3 |2x + 1| = 4 hp nya?

Matematika Wajib
Persamaan Mutlak X SMA

Pembahasan :
2/3 |2x + 1| = 4
|2x + 1| = 4 . 3/2
|2x + 1| = 6
(2x + 1)² = 6²
(2x + 1)² - 6² = 0
(2x + 1 + 6)(2x + 1 - 6) = 0
(2x + 7)(2x - 5) = 0
x = -7/2
x = 5/2

Hp : {-7/2 , 5/2}