已知x=
,y=
, 求
+
+2的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ceaebd304ba2b69aa9dd62d887bb9e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/508c40e7121e90cfb473bf9e9923c553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e7bf9200b351a259ddfc6c0266129d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916bb2cc1b29574ff95b47567c59ee0c.png)
更新时间:2020-04-03 07:20:34
|
相似题推荐
填空题
|
适中
(0.65)
【推荐2】已知
,
.
(1)
的值为______ ;
的值为______ ;
(2)若
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e04edeb51ac9c1bcba41cf12adb77b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24f2b640f2a19b4c87a7851966750.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745c100afb56c39c7706fc59aacac0ba.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c027863234f707346813714e7cab43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
填空题
|
适中
(0.65)
【推荐1】两个含有二次根式的代数式相乘,若它们的积不含二次根式,那么这两个代数式互为有理化因式.例如:
与
;
与
.
(1)
的有理化因式为___________ ;
(2)比较大小:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8872f952c0c95a1ec721c3e4d32b8e6f.png)
__________
(选填“>”“<”或“=”);
(3)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ba95025087e8432aed9d4bb401b677.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d012d124f04963fb72a68af40d5f8f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d012d124f04963fb72a68af40d5f8f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f190b17530d81d927c358ac84757a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34e01955f8c8fe2f0041b35d8d602a7.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07ebab4154c3c81746a61b787441f84.png)
(2)比较大小:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8872f952c0c95a1ec721c3e4d32b8e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0cb5c77047f6c137c513b6ca883fff7.png)
(3)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ba95025087e8432aed9d4bb401b677.png)
您最近一年使用:0次
填空题
|
适中
(0.65)
【推荐2】比较大小:①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cfe4e08c06bde245e58aa22485044c.png)
_______
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06284eec8ce29cba90972a5aa986c14.png)
_______
(填>、<或=)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cfe4e08c06bde245e58aa22485044c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53204688086b1d0111e91cb49fa0ac61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06284eec8ce29cba90972a5aa986c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e3ffeee0d42d590aaab09a9b83fd17.png)
您最近一年使用:0次