1/9a^2-1/4b^2=(1/2b+1/3a)( )(4m+ )^2=16m^2+4m+( )_数学解答 - 作业小助手

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1/9a^2-1/4b^2=(1/2b+1/3a)( )
(4m+ )^2=16m^2+4m+( )

人气：318 ℃　时间：2019-12-24 10:18:37

解答

平方差
1/9a^2-1/4b^2=(1/2b+1/3a)(1/3a-1/2b)
(4m+1/2)^2=16m^2+4m+(1/4)

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