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1 . 下列因式分解正确的是________ (填序号)
①
;②
;③
;④
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081ad142dfdbc70e684d93e6d1bca73f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67875f2329bda8890b7664d0a580bf0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212225db7387024c91f085195a64cdd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/052112e7345c2c4adad11cf4619834f7.png)
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2022-01-05更新
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2卷引用:吉林省长春市九台区2021-2022学年八年级上学期期末考试数学试题