(m+n)^2-(x-y)^2提取公因式.(2a+3b)^2-(a-2b)^24a^2n+4-9
问题描述:
(m+n)^2-(x-y)^2提取公因式.
(2a+3b)^2-(a-2b)^2
4a^2n+4-9
答
(m+n)^2-(x-y)^2提取公因式.
(2a+3b)^2-(a-2b)^2
4a^2n+4-9