若单项式
与
的差仍是单项式,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf5c1d124e8e023fe8e8c5ef3412813.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd4a4f49b47862658ef9f9ad71a369b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d50937ce22dd6e92f533a70a25427f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf5c1d124e8e023fe8e8c5ef3412813.png)
更新时间:2023-11-24 20:09:23
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【推荐1】已知a+b=5,则2(a+b)﹣4a﹣4b +21=________ .
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