7/(x^2+5x+6)-9/(x+3)+1< или = 0
X²+5x+6=0⇒x1+x2=-5 U x1*x2=6⇒x1=-3 U x2=-2 7/(x+3)(x+2) - 9/(x+3) + 1≤0 7-9(x+2)+x²+5x+6≤0 7-9x-18+x²+5x+6≤0 x²-4x-5≤0 x1+x2=4 U x1*x2=-5⇒x1=5 U x2=-1 + _ + _________________________________ -1 5 x∈[-1;5]