Question

Ini tntg persamaan nilai mutlak, yg tau jawabya,
1. |x-3| = |2x+4|

Answer 1

Materi : Persamaan Nilai Mutlak

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

Hp : {-7 , -1/3}