作业帮先化简,再求值,[x²+y²-(x-y)²+2y(x-y)]÷4y.其中x,y满足x²-2x+1+|y+1|=0
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/09 16:35:43
![先化简,再求值,[x²+y²-(x-y)²+2y(x-y)]÷4y.其中x,y满足x²-2x+1+|y+1|=0](/uploads/image/z/4036865-41-5.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%2C%5Bx%26%23178%3B%2By%26%23178%3B-%28x-y%29%26%23178%3B%2B2y%28x-y%29%5D%C3%B74y.%E5%85%B6%E4%B8%ADx%2Cy%E6%BB%A1%E8%B6%B3x%26%23178%3B-2x%2B1%2B%7Cy%2B1%7C%3D0)
先化简,再求值,[x²+y²-(x-y)²+2y(x-y)]÷4y.其中x,y满足x²-2x+1+|y+1|=0
先化简,再求值,[x²+y²-(x-y)²+2y(x-y)]÷4y.其中x,y满足x²-2x+1+|y+1|=0
先化简,再求值,[x²+y²-(x-y)²+2y(x-y)]÷4y.其中x,y满足x²-2x+1+|y+1|=0
[x²+y²-(x-y)²+2y(x-y)]÷4y
=[x²+y²-(x²-2xy+y²)+2y(x-y)]÷4y
=(x²+y²-x²+2xy-y²+2xy-2y²)÷4y
=(4xy-2y²)÷4y
化简得=（2x-y）÷2
x²-2x+1+|y+1|=0
(x-1)²+|y+1|=0
(x-1)²=0 |y+1|=0
x=1 y= -1
所以（2x-y）÷2=3/2