ДАЮ 15 БАЛЛОВ!!!
Решить уравнение
x⁴-10x²+9/4x+12 ≤0​

Ответ:

(x2–9)(x2–1)/(4x+12) ≤ 0

(x–3)(x+3)(x–1)(x+1)/4·(x+3) ≤ 0

(x–3)(x–1)(x+1)/4 ≤ 0,

_–__ (–3) __–____ [–1] _+__ [1] __–____ [3] __+__

О т в е т. (– ∞ ;–3)U(–3;–1]U[1;3]