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> 下列各式运算中,正确的是[]A.3a·2a=6aB.C.D.(2a+b)(2a-b)=2a2-b2-九年级数学
下列各式运算中,正确的是[]A.3a·2a=6aB.C.D.(2a+b)(2a-b)=2a2-b2-九年级数学
题目简介
下列各式运算中,正确的是[]A.3a·2a=6aB.C.D.(2a+b)(2a-b)=2a2-b2-九年级数学
题目详情
下列各式运算中,正确的是
[ ]
A.3a·2a=6a
B.
C.
D.(2a+b)(2a-b)=2a
2
-b
2
题型:单选题
难度:中档
来源:云南省中考真题
答案
B
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题目简介
下列各式运算中,正确的是[]A.3a·2a=6aB.C.D.(2a+b)(2a-b)=2a2-b2-九年级数学
题目详情
B.
C.
D.(2a+b)(2a-b)=2a2-b2
答案