计算:
(1)(﹣
)﹣2﹣(π﹣3)0+|﹣
|×33;
(2)(a﹣b﹣3)(a﹣b+3).
(1)(﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158b045c6172c4178d7aa52083e1489f.png)
(2)(a﹣b﹣3)(a﹣b+3).
更新时间:2020-07-25 23:59:04
|
相似题推荐
解答题-计算题
|
适中
(0.65)
名校
【推荐1】某同学在计算3(4+1)(
+1)时,把3写成(4﹣1)后,发现可以连续运用两数和乘以这两数差公式计算:
3(4+1)(
+1)=(4﹣1)(4+1)(
+1)=(
﹣1)(
+1)=
﹣1=255.
请借鉴该同学的经验,计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491405e462230737d5dc84abcbaca821.png)
3(4+1)(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491405e462230737d5dc84abcbaca821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491405e462230737d5dc84abcbaca821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491405e462230737d5dc84abcbaca821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491405e462230737d5dc84abcbaca821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f111a0826cf52ea303bbd813eca0c963.png)
请借鉴该同学的经验,计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b9b9464237d082d39743c04c855c73.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】“
”这个结论在数学中非常有用,有时我们需要将代数式配成完全平方式.例如:
,
,
,
.试利用“配方法”解决下列问题:
(1)已知
,求
的值;
(2)比较代数式:
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15db00d180f796f94a2c0fb5dd87d541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e2a68f36160e60176520d1ca95439d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d574bbed5aeabd521e130370de1cdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed22b1a25bdd522c72343d837da6aba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de681857ab3608aa7e62bf459179d55.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003b8f02e043e460a3e8d99456b191b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
(2)比较代数式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e1fbe0fb49725cf6d1e689ee8986d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a960e7bc045efb3966d50791f26f0248.png)
您最近一年使用:0次