(1-m-y)²后变成(1-m)²+2(1-m)y+y²的+2(1-m)y为什么符号是"+"
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 18:51:02
![(1-m-y)²后变成(1-m)²+2(1-m)y+y²的+2(1-m)y为什么符号是](/uploads/image/z/9285759-63-9.jpg?t=%281-m-y%29%26%23178%3B%E5%90%8E%E5%8F%98%E6%88%90%EF%BC%881-m%29%26%23178%3B%2B2%EF%BC%881-m%29y%2By%26%23178%3B%E7%9A%84%2B2%EF%BC%881-m%29y%E4%B8%BA%E4%BB%80%E4%B9%88%E7%AC%A6%E5%8F%B7%E6%98%AF%22%2B%22)
(1-m-y)²后变成(1-m)²+2(1-m)y+y²的+2(1-m)y为什么符号是"+"
(1-m-y)²后变成(1-m)²+2(1-m)y+y²的+2(1-m)y为什么符号是"+"
(1-m-y)²后变成(1-m)²+2(1-m)y+y²的+2(1-m)y为什么符号是"+"
(1-m-y)²后变成(1-m)²+2(1-m)y+y²的+2(1-m)y符号应该是“-”号,是“+”号就错了.