Упростите:
1)(x-5)(x+5)/(x+3)*1/x(x+5)=(x-5)/x(x+3) 2)(x-5)/x(x+3) -(x+5)/x(x-3)=(x²-5x-3x+15-x²-5x-3x-15)/x(x²-9)= =-16x/x(x²-9)=16/(9-x²)