1)-2х²+9x-7<0-2(x-7/2)(x-1)<0x>7/2 x<1 2)4х²+4x+1≤0(2x+1)²≤0x=-1/2 3) 4х^2 ≥ 9х4x²-9x≥0x(4x-9)≥0x≤0 x≥9/4 4) х² < 121x²-121<0(x-11)(x+11)<0-11 5) (3x-1)(x+4)(x-6) ≥ 0-4≤x≤1/3 x≥6