山东省德州市武城县四女寺镇中考数学同步复习练习解一元二次方程—分解因式法(无答案).doc

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1因式分解法解一元二次方程配套练习 1、 用因式分解法解方程 5(x+ 3)-2x(x +3)=0,可把其化为两个一元一次方程 -_和_求解。2、如果方程 x2-3x+c=0 有一个根为 1,那么 c=_,该方程的另一根为_, 该方程可化为(x -1) (x_)=03、用因式分解法 解下列方 程:(1)x 25x 0 (2)(3x+2) 2-4x2=0;(3)(x+2) 2=3x+6; (4) (2x-1) 2=(3-x) 2 (5) (2x3) (3x1)650【挑战】4已知关于 x的方程 22()(4)30axax。(1)当 为何值时,方程有一根为 0?并求出这时方程的另一个根。(2)当 为何值时,方程的两根互为相反数?并求出这 时方程的解。【循环练】5、解方程: 21()90x

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