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2018年秋九年级数学上册第二十一章一元二次方程第2课时配方法（1）（课后作业）习题课件（新版）新人教版.ppt

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2018年秋九年级数学上册第二十一章一元二次方程第2课时配方法（1）（课后作业）习题课件（新版）新人教版.ppt_第1页
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第2课时 配方法（1）,第二十一章 一元二次方程,1方程3x2+9=0的根为（ ）A3 B-3 C3 D无实数根 2.下列方程中，不能用直接开平方法的是_,作业本,D,C,3.填空：（1）x2+6x+（ ）（x+ ）2； （2）x28x+（ ）（x ）2； 4若8x2-16=0，则x的值是_,作业本,9,3,16,4,作业本,5.解方程 36x21=0,6.解方程：2x28=07.解方程：（2x）28108.解方程：4（x+3）2=25,作业本,x1=2，x2=2,

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