问题
选择题
用配方法解方程：x2﹣4x+2=0，下列配方正确的是 [ ]
A．（x﹣2）2=2
B．（x+2）2=2
C．（x﹣2）2=﹣2
D．（x﹣2）2=6
答案
答案：A
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用配方法解方程：x2﹣4x+2=0，下列配方正确的是 [ ]
A．（x﹣2）2=2
B．（x+2）2=2
C．（x﹣2）2=﹣2
D．（x﹣2）2=6
答案：A
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