Carilah nilai x jika ada. (x-4)=(x+2)

Materi : Persamaan Mutlak

Pembahasan :
|x - 4| = |x + 2|
(x - 4)² = (x + 2)²
(x - 4)² - (x + 2)² = 0
(x - 4 + x + 2)(x - 4 - x - 2) = 0
(2x - 2)(-6) = 0
-12x + 12 = 0
12x = 12
x = 1

Hp : {1}