作业帮[(x+y)²-(x-y)²] ÷（xy)
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 19:17:53
![[(x+y)²-(x-y)²] ÷（xy)](/uploads/image/z/7217728-16-8.jpg?t=%5B%28x%2By%29%26%23178%3B-%28x-y%29%26%23178%3B%5D+%C3%B7%EF%BC%88xy%29)
[(x+y)²-(x-y)²] ÷（xy)
[(x+y)²-(x-y)²] ÷（xy)
[(x+y)²-(x-y)²] ÷（xy)
[(x+y)²-(x-y)²] ÷（xy)
=（x^2+2xy+y^2-x^2+2xy-y^2)÷（xy)
=(4xy)÷（xy)
=4
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来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 19:17:53
[(x+y)²-(x-y)²] ÷（xy)
[(x+y)²-(x-y)²] ÷（xy)
[(x+y)²-(x-y)²] ÷（xy)
[(x+y)²-(x-y)²] ÷（xy)
=（x^2+2xy+y^2-x^2+2xy-y^2)÷（xy)
=(4xy)÷（xy)
=4