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> 计算的结果是().A.9B.3C.-3D.±3-九年级数学
计算的结果是().A.9B.3C.-3D.±3-九年级数学
题目简介
计算的结果是().A.9B.3C.-3D.±3-九年级数学
题目详情
计算
的结果是( ).
A.9
B.3
C.-3
D.±3
题型:单选题
难度:偏易
来源:不详
答案
B
分析:此题只要把两个
相乘即可得出结论.
解答:解:(
)2=
×
=3.
故选B.
点评:本题主要考查了实数的运算,直接把两个无理数相乘即可得到结果.
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题目简介
计算的结果是().A.9B.3C.-3D.±3-九年级数学
题目详情
答案
解答:解:(
故选B.
点评:本题主要考查了实数的运算,直接把两个无理数相乘即可得到结果.