(3m-1)(m+1)+(2m-1)(m-1)-(3m+5)(m-2) 好人 拜托你再帮我算一下好不好
问题描述:
(3m-1)(m+1)+(2m-1)(m-1)-(3m+5)(m-2) 好人 拜托你再帮我算一下好不好
答
(3m-1)(m+1)+(2m-1)(m-1)-(3m+5)(m-2)
=3m^2+2m-1+2m^2-3m+1-3m^2+m+10
=2m^2+10