已知[(x2+y2)-(x-y)2+2y(x-y)]÷4y=1,求4x/4x2-1/2x+y的值,要详细点的过程
题目有点错了,是[(x的平方+y的平方)-(x-y)的平方+2y(x-y)]÷4y=1,求4x/4x的平方-1/2x+y的值还是用中文吧,求[(4x的平方-y的平方)分之4x]-[(2x+y)分之1]的值