下列四种说法中正确的有( )
①关于x、y的方程
存在整数解.
②若两个不等实数a、b满足
,则a、b互为相反数.
③若
,则
.
④若
,则
.
①关于x、y的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fbad3098bd127fc432a1c1cb5d245b.png)
②若两个不等实数a、b满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a3b88c9f89fdd6bde3dbdb98135d88.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca58a06ef2bd4cf249b71fc5dae30a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f318dae61e291e3c28eff545f44787.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354e6a079cd820f96b2dd53487f2168a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f852ba97b6903cc685a979e2b7dadb44.png)
A.①④ | B.②③ | C.①②④ | D.②③④ |
2022·重庆·一模 查看更多[3]
2022年重庆市育才中学校九年级下学期一诊数学试题重庆市梁平区梁山集团七校2021-2022学年九年级下学期期中数学试题(已下线)专题14.27 因式分解概念及提取公因式(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(人教版)
更新时间:2022-04-07 12:47:34
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【推荐1】已知
满足
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e3a2a716b0cef21ad2df746437fd22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c1f376c9cdd89c21e5948d6aa83eaa.png)
A.1 | B.-5 | C.-6 | D.-7 |
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【推荐2】已知代数式
,
,
,下列结论中,正确的个数是( )
①若
,则
;
②若
,则一次函数
的图像必过第一、三、四象限;
③若
,
,
均为正整数,且
,则
;
④若
,
,且
为方程
的一个实数根,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883be1046dd3ddf42cc99e4c11236bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c551d754f3b8d8ad728cfd4fc34a8ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b0a141b11c5925e67dbda3ca5a905a.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f106abfef9c23b318909a4bcae031e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e01cf42ee59ff6a8b07e35ebe6ba0c.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7f49dbd48f890a3249b1781a3a4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a46b4e950b6fc1f7885ec992eab7b9ea.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d561cdf17d3a6d7d57af719cb6100c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c08bf0a121ade364913ff0d231f0315.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2764dbfd55c4149f6c2ba3ef87b9416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90842f726e2ae6363aec5cfa1a8612a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dab8bcd39cf3014764833cd4b2486a0.png)
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【推荐1】把多项式(3a-4b)(7a-8b)+(11a-12b)(8b-7a)分解因式的结果( )
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【推荐2】多项式x2﹣4xy﹣2y+x+4y2分解因式后有一个因式是x﹣2y,另一个因式是( )
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