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解下列方程:(1)(用配方法)(2)(3)(4)
相关试题
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解下列方程:
(1)用直接开平方法解方程:2x2-24=0
(2)用配方法解方程:x2+4x+1=0
(3)解方程:
.
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解下列方程:
(1)用直接开平方法解方程:2x2-24=0
(2)用配方法解方程:x2+4x+1=0
(3)解方程:
.
-
解下列方程:
(1)用直接开平方法解方程:2x2-24=0
(2)用配方法解方程:x2+4x+1=0.
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解下列方程
(1)用公式法解方程:![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAF8AAAAZCAYAAABXTfKEAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(2)用配方法解方程:2x2+2
x+1=0
(3)用因式分解法:(2y+1)2=4y+2
(4)用适当的方法解方程:x2-6x+9=(5-2x)2.
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用适当的方法解下列方程
(1)
(2)用配方法解方程:![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFgAAAAVCAYAAADCUymGAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
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解下列方程:
(1)用开平方法解方程:(x-1)2=4
(2)用配方法解方程:x2-4x+1=0
(3)用公式法解方程:3x2+5(2x+1)=0
(4)用因式分解法解方程:3(x-5)2=2(5-x)
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解下列方程:
(1)用开平方法解方程:(x-1)2=4
(2)用配方法解方程:x2-4x+1=0
(3)用公式法解方程:3x2+5(2x+1)=0
(4)用因式分解法解方程:3(x-5)2=2(5-x)
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解下列方程:
(1)用开平方法解方程:(x-1)2=4
(2)用配方法解方程:x2-4x+1=0
(3)用公式法解方程:3x2+5(2x+1)=0
(4)用因式分解法解方程:3(x-5)2=2(5-x)
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阅读下边一元二次方程求根公式的两种推导方法:
![](https://img.xintiku.com/upload/00/1d/001d69b1257c91947c778365841a35b4.png)
请回答下列问题:
(1)这两种方法有什么异同?你认为哪个方法好?
(2)说说你有什么感想?
(3)选用上述方法解方程:(x-1)(2-3x)=x-8.
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计算(每小题3分,共6分)
用适当的方法解下列方程(每小题4分,共8分)
(1)
(2)用配方法解方程:![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAF0AAAAVCAYAAAAkeuLCAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)