作业帮求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/20 20:25:30
![求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.](/uploads/image/z/978595-43-5.jpg?t=%E6%B1%82%5B%28x%26%23178%3B%2By%26%23178%3B%29-%28x-y%29%26%23178%3B%2B2y%28x-y%29%5D%C3%B74y%E7%9A%84%E5%80%BC%2C%E5%85%B6%E4%B8%AD2x-y%3D8.)
求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
求[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值,其中2x-y=8.
=[x²+y²-x²+2xy-y²+2xy-2y²]÷4y
=[4xy-2y²]÷4y
=2y[2x-y]÷4y
=[2x-y]÷2
=8÷2
=4