计算 x-y分之x²+xy÷x-y分之xy
问题描述:
计算 x-y分之x²+xy÷x-y分之xy
答
原式=x(x+y)/(x-y)*(x-y)/xy
=(x+y)/y
计算 x-y分之x²+xy÷x-y分之xy
原式=x(x+y)/(x-y)*(x-y)/xy
=(x+y)/y