4+12(x-y)+9(x-y)²

来源:学生作业帮助网 编辑:作业帮 时间:2024/10/04 14:10:59
4+12(x-y)+9(x-y)²
x)3y {:

4+12(x-y)+9(x-y)²
4+12(x-y)+9(x-y)²

4+12(x-y)+9(x-y)²
4+12(x-y)+9(x-y)²=[3(x-y)+2]²