(3a+2b)²-(2a+3b)²
问题描述:
(3a+2b)²-(2a+3b)²
急,
答
(3a+2b)²-(2a+3b)²
=[(3a+2b)+(2a+3b)][(3a+2b)-(2a+3b)]
=(5a+5b)(a-b)
=5(a+b)(a-b)