xy/x-z-xy/y-z 分式化简
问题描述:
xy/x-z-xy/y-z 分式化简
答
xy/x-z-xy/y-z =[xy(y-z)-xy(x-z)]/(x-z)(y-z)=xy(y-x)/[(x-z)(y-z)]
xy/x-z-xy/y-z 分式化简
xy/x-z-xy/y-z =[xy(y-z)-xy(x-z)]/(x-z)(y-z)=xy(y-x)/[(x-z)(y-z)]