(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

(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