作业帮先化简,再求值 (x²-y²/xy)²÷（x+y）²*(x/x-y)²,其中x=3,y=2
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/16 14:52:39
x){gu
:OzmlzڰGABMZBWTjBXQ]~O'D@KBB&uۓ k+lu*mlij~
}&\
`@iWj09-C}
d
Z
PZAaX-T!gmak37/.H̳ v
先化简,再求值 (x²-y²/xy)²÷（x+y）²*(x/x-y)²,其中x=3,y=2
先化简,再求值 (x²-y²/xy)²÷（x+y）²*(x/x-y)²,其中x=3,y=2
先化简,再求值 (x²-y²/xy)²÷（x+y）²*(x/x-y)²,其中x=3,y=2
x=3,y=2
(x²-y²/xy)²÷（x+y）²*(x/(x-y)²
= (x+y)(x-y)/(xy)² *1/(x+y）² * x²/(x-y)²
= y² /{(x+y)(x-y)}
= 2² /{(3+2)(3-2)}
= 4/5