(x2+3x+1) (x2+3x-3) больше или равно 5

x²+3x-3=a(a+4)*a≥5a²+4a-5≥0a1=a2=-4 U a1*a2=-5a1=-5 U a2=1a≤-5⇒x²+3x-3≤-5x²+3x+2≤0x1+x2=-3 U x1*x2=2x1=-2 U x2=-1-2≤x≤-1a≥1⇒x²+3x-3≥1⇒x²+3x-4≥0x1=x2=-3 U x1*x2=-4x1=-4 U x2=1x≤-4 U x≥1x∈(-∞;-4] U [-2;-1] U [1;∞)