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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