有一道题目“当a=2,b=-2时,求多项式3a^3b^-1/2a^2b+b-(4a^3b^3-1/4a^2b-b^2)+(a^3b^3+1/4a^2b)-2b^2+3的”,甲同学做题时把a=2错抄成a=-2,乙同学没抄错题,但他们作出的结果恰好一样,这是怎么回事?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 04:02:30
![有一道题目“当a=2,b=-2时,求多项式3a^3b^-1/2a^2b+b-(4a^3b^3-1/4a^2b-b^2)+(a^3b^3+1/4a^2b)-2b^2+3的”,甲同学做题时把a=2错抄成a=-2,乙同学没抄错题,但他们作出的结果恰好一样,这是怎么回事?](/uploads/image/z/746345-65-5.jpg?t=%E6%9C%89%E4%B8%80%E9%81%93%E9%A2%98%E7%9B%AE%E2%80%9C%E5%BD%93a%3D2%2Cb%3D-2%E6%97%B6%2C%E6%B1%82%E5%A4%9A%E9%A1%B9%E5%BC%8F3a%5E3b%5E-1%2F2a%5E2b%2Bb-%284a%5E3b%5E3-1%2F4a%5E2b-b%5E2%29%2B%28a%5E3b%5E3%2B1%2F4a%5E2b%29-2b%5E2%2B3%E7%9A%84%E2%80%9D%2C%E7%94%B2%E5%90%8C%E5%AD%A6%E5%81%9A%E9%A2%98%E6%97%B6%E6%8A%8Aa%3D2%E9%94%99%E6%8A%84%E6%88%90a%3D-2%2C%E4%B9%99%E5%90%8C%E5%AD%A6%E6%B2%A1%E6%8A%84%E9%94%99%E9%A2%98%2C%E4%BD%86%E4%BB%96%E4%BB%AC%E4%BD%9C%E5%87%BA%E7%9A%84%E7%BB%93%E6%9E%9C%E6%81%B0%E5%A5%BD%E4%B8%80%E6%A0%B7%2C%E8%BF%99%E6%98%AF%E6%80%8E%E4%B9%88%E5%9B%9E%E4%BA%8B%3F)
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