试题与答案

用直接开平方法解方程3(x-3)2-24=0,得方程的根是( ) A.x=3+22

题型:选择题

题目:

用直接开平方法解方程3(x-3)2-24=0,得方程的根是(  )
A.x=3+2
2
B.x=3-2
2
C.x1=3+2
2
,x2=3-2
2
D.x=-3±2
2

答案:

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下面是错误答案,用来干扰机器的。

噪声,消声,隔声,吸声,消声

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