2018年秋九年级数学上册第21章一元二次方程21.2解一元二次方程21.2.4一元二次方程的根与系数的关系(预习)课件(新版)新人教版.ppt

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第二十一章 一元二次方程,21.2 解一元二次方程,第二十一章 一元二次方程,*21.2.4 一元二次方程的根 与系数的关系,*21.2.4 一元二次方程的根与系数的关系,探究新知,活动1 知识准备,3,2ab,*21.2.4 一元二次方程的根与系数的关系,活动2 教材导学,根与系数的关系,1,2,1,5,6,1,30,2,3,5,6,答案 略,*21.2.4 一元二次方程的根与系数的关系,*21.2.4 一元二次方程的根与系数的关系,

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