х(3х-1)-х^2+16 ≤ х(2-х) -х(11-2х) 3х² - х - х² + 16 ≤ 2х -х² - 11х+ 2х² 2х² - х +16 -2х + х² +11х - 2х² ≤ 0 х² + 8х +16 ≤ 0 x2 + 8x + 16 = 0 D = b2 - 4ac D = 64 - 64 = 0 x = - b/2a x = - 8/2= -4 Ответ: x = -4 х∈ [-4, 0]