|13 - 2x | ≥ |4x - 9|
(13 - 2x - (4x - 9))(13 - 2x + (4x - 9)) ≥ 0
(13 - 2x - 4x + 9)(13 - 2x + 4x - 9) ≥ 0
(22 - 6x)(2x + 4) ≥ 0
- 6(x - 22/6)* 2(x + 2) ≥ 0
(x - 11/3)(x + 2) ≤ 0
+ - +
[-2][3 2/3]
ответ : x ∈ [ - 2 ; 3 2/3]
|13 - 2x | ≥ |4x - 9|
(13 - 2x - (4x - 9))(13 - 2x + (4x - 9)) ≥ 0
(13 - 2x - 4x + 9)(13 - 2x + 4x - 9) ≥ 0
(22 - 6x)(2x + 4) ≥ 0
- 6(x - 22/6)* 2(x + 2) ≥ 0
(x - 11/3)(x + 2) ≤ 0
+ - +
[-2][3 2/3]
ответ : x ∈ [ - 2 ; 3 2/3]