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山东省德州市武城县四女寺镇中考数学复习练习一元二次方程第3课时直接开平方法解一元二次方程（无答案）.doc

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山东省德州市武城县四女寺镇中考数学复习练习一元二次方程第3课时直接开平方法解一元二次方程（无答案）.doc_第1页
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1直接开平方法解一元二次方程1、解下列方程 （1） x2169 （2） 042x （3） 45 x20（4） 012x （5） 03412x （6）4 x2+1602、解下列方程（1） （x1） 240 （2）(x1) 2180（3）12（2x） 290 （4）(13x) 21（4）x 24x+4=16 （6）4x 2+12 x+9=25

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