1 . 若直角三角形的两条直角边长分别为
,则第三条边长
的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5bc168ba33c0bd99aeefbf094f64c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2 . 计算
(1)
.
(2)解方程:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d5d0e5261bd355fff0bb8ade5bbd2c.png)
(2)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccf6f82cb711c0f061958fa4025af7e.png)
您最近一年使用:0次
3 . (1)解方程:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9deaadcccaa7a1aaed4a9d78cf2c9fac.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35d56a61b973a187b7b751e2ffe8a84.png)
(2)解方程组:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8000a147023efcf34cd4c1bbed75fea.png)
②
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9deaadcccaa7a1aaed4a9d78cf2c9fac.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35d56a61b973a187b7b751e2ffe8a84.png)
(2)解方程组:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8000a147023efcf34cd4c1bbed75fea.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111758173aa56956a8d5c2b1505ff703.png)
您最近一年使用:0次
4 . 计算或解方程:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350bc0d02cee6cbfc4ee2d2799bf3c78.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657a134682bdd230c5c22ecc3cc6ec80.png)
您最近一年使用:0次
5 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
______ ;若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c96c3bd7621beb33b3dd551ce1fd785d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce47e8b6c112c802419ccedb9c5eb937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
您最近一年使用:0次
6 . 在一次活动课中,虹烨同学用一根绳子围成一个长宽之比为
,面积为
的长方形.
(1)求长方形的长和宽;
(2)她用另一根绳子围成一个正方形,且正方形的面积等于原来围成的长方形面积,她说:“围成的正方形的边长与原来长方形的宽之差大于
”,请你判断她的说法是否正确,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84783b6ba0f36789519816101a437f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42ac0659980f1b40c8390d804da47b.png)
(1)求长方形的长和宽;
(2)她用另一根绳子围成一个正方形,且正方形的面积等于原来围成的长方形面积,她说:“围成的正方形的边长与原来长方形的宽之差大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
您最近一年使用:0次
7 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e4d2bcf4cdaab2a07ddf3640bb7ffa.png)
________ ;若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e4d2bcf4cdaab2a07ddf3640bb7ffa.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6306d5912c85f78f2452fdadd38423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e4d2bcf4cdaab2a07ddf3640bb7ffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b003764a55fae6b333b4f67dd68640fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e4d2bcf4cdaab2a07ddf3640bb7ffa.png)
您最近一年使用:0次
8 . 求x的值:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07cfa97dc1bcf6b2eb2a17d593247827.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07cfa97dc1bcf6b2eb2a17d593247827.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff305e678840c4c788143567b9e68987.png)
您最近一年使用:0次
9 . 求出下列式子中x的值:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb9d2ff4fa667fe78b5fe2830c4275c.png)
您最近一年使用:0次
10 . 利用平方根来解下列方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6403ea13c3d4e326794acc6a65e779d3.png)
您最近一年使用:0次