Найдите целые решения неравенств 1.) (x-1)(x+1)< =0 2.) 2+x-x^2=> 0 3.) -x^2-5x+6> 0 4.) 3x^2-7x+2< 0

1) (x - 1)(x + 1) <= 0
x = {-1, 0, 1}
2) x^2 - x - 2 = (x + 1)(x - 2) <= 0
x = {-1; 0; 1; 2}
3) x^2 + 5x - 6 = (x - 1)(x + 6) < 0
x = {-5; -4; -3; -2; -1; 0}
4) 3x^2 - 7x + 2 = (3x - 1)(x - 2) < 0
x = {1}