(1)先化简,再求值:
,其中
.
(2)若代数式
,求代数式
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a539c8a3a34ca53e4a11511adca90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c96251b02af13e80678f673abc8b519a.png)
(2)若代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d509d188328e25d3999769e228403d46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85bcfd9907943ed6d05fb1f588402712.png)
更新时间:2021-11-30 09:54:47
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相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】数学中,运用整体思想在求代数式的值时非常重要
例如:已知
,则代数式
,
.
请根据以上材料解答以下问题:
(1)若整式
的值是
,求整式
的值
(2)若
,求
的值
(3)当
时,多项式
的值是
,求当
时,多项式
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e2267e0aa6350c58a95e2195582ab86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d52a201ca51c28691921ebe97e5f302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8c2db688abb37677fdb9e23dade934.png)
请根据以上材料解答以下问题:
(1)若整式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de34cb4ed0037a5ed98f8e25d53e7924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e68a435e4f4c481f3c556dcce6735b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55b22f5dd9ec13167caeddb78a2c02f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/664ccf9cc1aa77e62d521a713befbc22.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94fb66755fd1d30181a3aeaf103420d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94fb66755fd1d30181a3aeaf103420d3.png)
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解答题-计算题
|
较易
(0.85)
【推荐1】化简求值:
(2x²y-4xy²)-(-3xy²+x²y)其中x=
y=
.
(2x²y-4xy²)-(-3xy²+x²y)其中x=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82fb61d406b5be37d359c55972beef5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16e1164381ea7862edaff362deb1b99.png)
您最近一年使用:0次