化简:2x^2y+{2xy-[3x^2y-2(-3x^2y+2xy)]-4xy^2}
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/09/14 03:35:37
化简:2x^2y+{2xy-[3x^2y-2(-3x^2y+2xy)]-4xy^2}
2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy²}
=2x²y+2xy-6x²y-4xy-4xy²
=-(4x²y+2xy+4xy²)
=-2xy(2x+1+2y)
再问: 答案是对的吗?解释,谢谢!
再答: 不对 我再改 等等哈 2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy²} =2x²y+2xy-9x²y+4xy-4xy² =6xy-7x²y-4xy² =xy(6-7x-4y)
再问: 还是跟我的不一样,我没有过程,所以我想问一下怎么做的
再答: 现在呢 我刚刚又改了
再问: 我的答案是-7x^2y+6xy-4xy^2
再答: 那就一样了 呵呵 终于啊 不容易啊
=2x²y+2xy-6x²y-4xy-4xy²
=-(4x²y+2xy+4xy²)
=-2xy(2x+1+2y)
再问: 答案是对的吗?解释,谢谢!
再答: 不对 我再改 等等哈 2x²y+{2xy-[3x²y-2(-3x²y+2xy)]-4xy²} =2x²y+2xy-9x²y+4xy-4xy² =6xy-7x²y-4xy² =xy(6-7x-4y)
再问: 还是跟我的不一样,我没有过程,所以我想问一下怎么做的
再答: 现在呢 我刚刚又改了
再问: 我的答案是-7x^2y+6xy-4xy^2
再答: 那就一样了 呵呵 终于啊 不容易啊
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