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用配方法解一元二次方程x 2 -8x+1=0，把右边配成完全平方后为（x-______） 2 =______
用配方法解一元二次方程x 2 -8x+1=0，把右边配成完全平方后为（x-______） 2 =______
2025-03-15 14:21:01
推荐回答（1个）
回答1：
把方程x
2
-8x+1=0的常数项移到等号的右边，得到x
2
-8x=-1
方程两边同时加上一次项系数一半的平方，得到x
2
-8x+16=-1+16
配方得（x-4）
2
=15．
故答案为4，15．
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