(x²+3x)/((x²-3)≤2x/(3-x²) ОДЗ: x²-3≠0 x²≠3 x₁≠-√3 x₂≠√3.
(x²+3x)/(x²-3)≤-2x/(x²-3)
(x²+3x)/(x²-3)+2x/(x²-3)≤0
(x²+3x+2x)/(x²-3)≤0
(x²+5x)/(x²-3)≤0
x*(x+5)/((x-√3)*(x+√3)≤0
-∞____+____-5____-____-√3____+____0____-____√3____+____+∞
Ответ: x∈[-5;-√3)U[0;√3).