1 . 利用十字相乘法分解因式:
(1)
;
(2)
.
(3)求方程
的解集.
(4)求证:对任意的x,a,b,都有
.
(5)已知“任意l和s,都有
”是真命题,借助这个结论将
进行因式分解.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fdf57778bfe4dab4ee539f27ec9758c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96791c33798bd64168fbcfed8227e3d7.png)
(3)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86eb4ca4061cc0763ceb703feebc2b69.png)
(4)求证:对任意的x,a,b,都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22f618009ca40d3c793a14fdbf1b32d.png)
(5)已知“任意l和s,都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84b242ba1b490d6179e5f68f425bcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ac4ca64fdb94ebfac63b6d45a453be.png)
您最近一年使用:0次
2 . 证明:
,
,
,
四点共圆.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99296bab1b42898e7ca336a822510258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9de26b261d3311bba2e4750c1f2a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85d44b8a8d1e0a6044c1e67204f1487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e1551e3a1386776ba06f22bb4bcb5d.png)
您最近一年使用:0次