(3m+2n-2)(3m-2 n+2)

2025-06-27 21:44:59
推荐回答(1个)
回答1:

(3m+2n-2)(3m-2 n+2)
=[3m+(2n-2)[3m-(2 n-2)]
=(3m)的平方-(2n-2)的平方
=9 m的平方-4 n的平方+8n-4