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2019年春八年级数学下册第17章一元一次方程17.2一元二次方程的解法第1课时配方法课件（新版）沪科版.pptx

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第17章 一元二次方程,17.2 一元二次方程的解法,解:x2-2x-3=0, x2-2x+1=3+1,( x-1 )2=4,x-1=2, x1=3,x2=-1.,( 2 )x2+16=-10x;,

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