9(x-y)²-4(x+y)²因式分解
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/08 09:39:17
9(x-y)²-4(x+y)²因式分解
原式=[3(x-y)+2(x+y)][3(x-y)-2(x+y)]
=(5x-y)(x-5y)
9(x-y)²-4(x+y)²
=[3(x-y)+2(x+y)]*[3(x-y)-2(x+y)]
=[3x-3y+2x+2y]*[3x-3y-2x-2y]
=(5x-y)(x-5y)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/08 09:39:17
9(x-y)²-4(x+y)²因式分解
原式=[3(x-y)+2(x+y)][3(x-y)-2(x+y)]
=(5x-y)(x-5y)
9(x-y)²-4(x+y)²
=[3(x-y)+2(x+y)]*[3(x-y)-2(x+y)]
=[3x-3y+2x+2y]*[3x-3y-2x-2y]
=(5x-y)(x-5y)