问题 计算题
分解因式
(1)(3m+2n)2-(m-4n)2(2)9(2p+3q)2-(2p-q)2
答案

(1)解:原式=(4m-2n)(2m+6n)

                       =4(2m-n)(m+3n)

(2)解:原式=[3(2p+3q)-(2p-q)][3(2p+3q)+(2p-q)] 

                      =(4p+10q)(8p+8q)

                      =16(2p+5q)(p+q)

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