y=(3-x²)/(x+2)y`=(-2x*(x+2)-1*(3-x²))/(x+2)²=(-2x²-4x-3+x²)/(x+2)²=-(x²+4x+3)/(x+2)²=0-(x²+4x+3)=0x1+x2=-4 u x1*x2=3x1=-3 U x2=-1 _ + _--------------------------------------------------- убыв -3 возр -1 убыв min maxубыв x∈(-∞;-3) U (1;∞)возр x∈(-3;-1)