通分:(1)x/x²+2xy+y²与y/x+y (2)x+4/x²+4x与x-5/x(x-5)-2(x-5)

问题描述:

通分:(1)x/x²+2xy+y²与y/x+y (2)x+4/x²+4x与x-5/x(x-5)-2(x-5)
快速回答会被采纳哦! 但是要正确的答案.

通分:(1)x/x²+2xy+y²与y/x+y x/x²+2xy+y²=x/(x+y)²y/x+y =[y(x+y)]/(x+y)²(2)x+4/x²+4x与x-5/x(x-5)-2(x-5)∵x+4/x²+4x=(x+4)/[x(x+4)]=1/xx-5/x(x-5)-2(x-5)=(x-5)/[(...