Selesaikan persaman nilai mutlak 2x + 3 =|4x + 5|

Materi : Persamaan Mutlak

Pembahasan :
2x + 3 = |4x + 5|
(2x + 3)² = (4x + 5)²
(4x + 5)² - (2x + 3)² = 0
(4x + 5 + 2x + 3)(4x + 5 - 2x - 3) = 0
(6x + 8)(2x + 2) = 0
x = -4/3
x = -1

Hp : {-4/3 , -1}