∵分式1/x的平方-1无意义∴x²-1=0x²=1所求的分式是这样的吧?[（x²+6x+9)/(x-3)] ÷ [(x+3)/(x²-6x+9)][（x²+6x+9)/(x-3)] ÷ [(x+3)/(x²-6x+9)]=[(x+3)²/(x-3) ]÷ [(x+3)/(x-3)...