Question

решите неравенство (х+4) (х-1) (х-2)≥0​

Answer 1

х+4≥0.........х-1≥0........х-2≥0

х≥0-4.........х≥0+1........х≥0+2

х≥-4..........х≥1..........х≥2

Ответ: х1≥-4, х2≥1, х3≥2

Проверка:

(-4+4)(1-1)(2-2)≥0

0≥0