(3a+2b)²=(3a-2b)²+( )

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(3a+2b)²=(3a-2b)²+( )
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(3a+2b)²=(3a-2b)²+( )
(3a+2b)²=(3a-2b)²+( )
 

(3a+2b)²=(3a-2b)²+( )
答案是24ab 3a*2b*4=24ab

24ab

(3a+2b)^2=(3a-2b)^2+24ab