计算：(x²-2xy+y²)-2(x²+2xy+y²)

来源：学生作业帮助网编辑：六六作业网时间：2024/11/17 04:39:29

计算：(x²-2xy+y²)-2(x²+2xy+y²)计算：(x²-2xy+y²)-2(x²+2xy+y²)计算：(x&

计算：(x²-2xy+y²)-2(x²+2xy+y²)
计算：(x²-2xy+y²)-2(x²+2xy+y²)

计算：(x²-2xy+y²)-2(x²+2xy+y²)
(x²-2xy+y²)-2(x²+2xy+y²)
=-x²-6xy-y²