(19x - 10 - (7x - 18)) * (19x - 10 + 7x - 18) ≤ 0
(19x - 10 - 7x + 18)* (19x - 10 + 7x - 18) ≤ 0
(12x + 8 )*(26x - 28) ≤ 0
8* (3x + 2) *(13x - 14) ≤ 0
(3x + 2)(13x - 14) ≤ 0
3x + 2 = 0
3x = - 2
x = - 2/3
13x - 14 = 0
13x = 14
x = 14/13
Ответ
x ∈ [ - 2/3; 14/13]