用直接开平方法解方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca887b18ec8bf32c4f2b16564d15822.png)
23-24九年级上·全国·课后作业 查看更多[1]
更新时间:2023-09-18 16:50:07
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【知识点】 解一元二次方程——直接开平方法解读
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解答题-问答题
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【推荐1】用适当的方法解下列一元二次方程.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15583d3b7cd69791292cb0ef0298180c.png)
(2)
(用配方法)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f510691fcf7efa3bab3043bc2a182a38.png)
(4)
(用公式法)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15583d3b7cd69791292cb0ef0298180c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8719d60f740f19eeb2b65143225b264.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f510691fcf7efa3bab3043bc2a182a38.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ee93c36e1250d1347edc14afd18d6.png)
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【推荐2】解下列方程:
(1)4(x+1)2=25;
(2)x(2x+3)=4x+6;
(3)
;
(4)x2+
=0.
(1)4(x+1)2=25;
(2)x(2x+3)=4x+6;
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba3aacdc011e5e4147ce02f077cedc8.png)
(4)x2+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38b707dbe880382c607dce4fd87a78d.png)
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