学帮网3x²y－﹛x²z－[3x²y＋﹙﹣xyz﹚－3x²z]﹜
来源：学生作业学帮网 编辑：学帮网 时间：2024/04/29 09:07:09
3x²y－﹛x²z－[3x²y＋﹙﹣xyz﹚－3x²z]﹜
解
3x²y-{x²z-[3x²y+(-xyz)-3x²z]}
=3x²y-[x²z-(3x²y-xyz-3x²z)]
=3x²y-(x²z-3x²y+xyz+3x²z)
=3x²y-(4x²z-3x²y+xyz)
=3x²y-4x²z+3x²y-xyz
=6x²y-4x²z-xyz
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来源：学生作业学帮网 编辑：学帮网 时间：2024/04/29 09:07:09
3x²y－﹛x²z－[3x²y＋﹙﹣xyz﹚－3x²z]﹜
解
3x²y-{x²z-[3x²y+(-xyz)-3x²z]}
=3x²y-[x²z-(3x²y-xyz-3x²z)]
=3x²y-(x²z-3x²y+xyz+3x²z)
=3x²y-(4x²z-3x²y+xyz)
=3x²y-4x²z+3x²y-xyz
=6x²y-4x²z-xyz