(x-1)(x+1)≤0 + - +-----------|----------------|---------------x -1 1x∈[-1;1]. x=-1;0;12. 2+x+-x²≥0. -(x-1)(x+2)≥0 - + - ---------|-----------|------------- x -2 1x∈[-2;1]. x=-2;-1;0;1-x²-5x+6>0. -(x-1)(x+6)>0 - + -------------|------------|------------------- x -6 1x∈(-6;1). x=-5;-4;-3;-2;-1;03x²-7x+2<0. 3(x-2)(x-1/3)<0 + - +--------------|------------|---------------------- x 1/3 2x∈(1/3;2), x=1