化简5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y².

来源：学生作业帮助网编辑：六六作业网时间：2024/11/21 20:04:29

化简5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y².化简5y-x/x²-y²-3x-4y/y

化简5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y².
化简5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y².

化简5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y².
5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y².
=（5y-x+3x+4y-x+2y)/(x^2-y^2)
=(11y+x)/x^2-y^2

5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y²
=(5y-x+3x-4y-x-2y)/(x+y)(x-y)
=(x-y)/(x+y)(x-y)
=1/(x+y)