计算：y/(x的平方-xy)+2/(y-x)-x/(y的平方-xy)_数学解答

计算：y/(x的平方-xy)+2/(y-x)-x/(y的平方-xy)

人气：133 ℃　时间：2020-01-28 15:53:16

解答

y/(x²-xy)+2/(y-x)-x/(y²-xy)
=[y²+2(-xy)+x²]/(x²y-xy²)
=(x-y)²/[(x-y)xy]
=(x-y)/(xy)