学帮网化简求值：﹣3﹙a³-a²+2a-1﹚-2﹙﹣3a³+2a²-1/2a+2﹚-3(﹣a³-a²+2a+1﹚,其中a=﹣2
来源：学生作业学帮网 编辑：学帮网 时间：2024/07/06 19:35:11
化简求值：﹣3﹙a³-a²+2a-1﹚-2﹙﹣3a³+2a²-1/2a+2﹚-3(﹣a³-a²+2a+1﹚
,其中a=﹣2
﹣3﹙a³-a²+2a-1﹚-2﹙﹣3a³+2a²-1/2a+2﹚-3(﹣a³-a²+2a+1﹚
=-3a³+3a²-6a+3+6a³-4a²+a-4+3a³+3a²-6a-3
=6a³+2a²-11a-4
=6×(-2)³+2×(-2)²-11×(-2)-4
=-48+8+22-4
=-32