作业帮[2(x-y)³-8(x-y)²(x+y)+6y(x-y)²]÷2（x-y）².
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/04 13:24:20
![[2(x-y)³-8(x-y)²(x+y)+6y(x-y)²]÷2（x-y）².](/uploads/image/z/5298597-45-7.jpg?t=%5B2%28x-y%29%26%23179%3B-8%28x-y%29%26%23178%3B%28x%2By%29%2B6y%28x-y%29%26%23178%3B%5D%C3%B72%EF%BC%88x-y%EF%BC%89%26%23178%3B.)
[2(x-y)³-8(x-y)²(x+y)+6y(x-y)²]÷2（x-y）².
[2(x-y)³-8(x-y)²(x+y)+6y(x-y)²]÷2（x-y）².
[2(x-y)³-8(x-y)²(x+y)+6y(x-y)²]÷2（x-y）².
原式=2(x-y)²[(x-y)-4(x+y)+3y]÷2(x-y)²
=x-y-4x-4y+3y
=-3x-2y