lx-2l < lx+2l tolong sob ane mau uts besok

|x - 2| ≤ |x + 2|
(x - 2)² ≤ (x + 2)²
x² - 4x + 4 ≤ x² + 4x + 4
8x ≥ 0
x ≥ 0

HP : {x| x ≥ 0 , x ∈ R}