第一个是:(2a+b-c+3d)(2a-b+c+3b)第二个:先化简,再求值:(x-y)的平方(x的平方+xy+y的平方)的平方-(x的三次方+y的三次方)(-x的三次方+y的三次方),其中x=1,y=-1.呵呵,真不好意思,有点
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 14:39:48
![第一个是:(2a+b-c+3d)(2a-b+c+3b)第二个:先化简,再求值:(x-y)的平方(x的平方+xy+y的平方)的平方-(x的三次方+y的三次方)(-x的三次方+y的三次方),其中x=1,y=-1.呵呵,真不好意思,有点](/uploads/image/z/7616235-3-5.jpg?t=%E7%AC%AC%E4%B8%80%E4%B8%AA%E6%98%AF%EF%BC%9A%EF%BC%882a%2Bb-c%2B3d%EF%BC%89%EF%BC%882a-b%2Bc%2B3b%EF%BC%89%E7%AC%AC%E4%BA%8C%E4%B8%AA%EF%BC%9A%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%EF%BC%9A%EF%BC%88x-y%EF%BC%89%E7%9A%84%E5%B9%B3%E6%96%B9%EF%BC%88x%E7%9A%84%E5%B9%B3%E6%96%B9%2Bxy%2By%E7%9A%84%E5%B9%B3%E6%96%B9%EF%BC%89%E7%9A%84%E5%B9%B3%E6%96%B9-%EF%BC%88x%E7%9A%84%E4%B8%89%E6%AC%A1%E6%96%B9%2By%E7%9A%84%E4%B8%89%E6%AC%A1%E6%96%B9%EF%BC%89%EF%BC%88-x%E7%9A%84%E4%B8%89%E6%AC%A1%E6%96%B9%2By%E7%9A%84%E4%B8%89%E6%AC%A1%E6%96%B9%EF%BC%89%2C%E5%85%B6%E4%B8%ADx%3D1%2Cy%3D-1.%E5%91%B5%E5%91%B5%2C%E7%9C%9F%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D%2C%E6%9C%89%E7%82%B9)
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