4+9(x-y)²+12(x-y)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 07:34:22
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4+9(x-y)²+12(x-y)
4+9(x-y)²+12(x-y)
4+9(x-y)²+12(x-y)
4+9(x-y)²+12(x-y)
=9(x-y)²+12(x-y)+4
=[3(x-y)+2]²
=(3x-3y+2)²
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 07:34:22
4+9(x-y)²+12(x-y)
4+9(x-y)²+12(x-y)
4+9(x-y)²+12(x-y)
4+9(x-y)²+12(x-y)
=9(x-y)²+12(x-y)+4
=[3(x-y)+2]²
=(3x-3y+2)²