说明代数式(a²-3a-3-a)-(a-8+4a²+2a³)+(3a³+3a³+4a-1)与a的取值无关

说明代数式(a²-3a-3-a)-(a-8+4a²+2a³)+(3a³+3a³+4a-1)与a的取值无关
说明代数式(a²-3a-3-a)-(a-8+4a²+2a³)+(3a³+3a³+4a-1)与a的取值无关

说明代数式(a²-3a-3-a)-(a-8+4a²+2a³)+(3a³+3a³+4a-1)与a的取值无关
(a²-3a-3-a³)-(a-8+4a²+2a³)+(3a³+3a²+4a-1)
=a²-3a-3-a³-a+8-4a²-2a³+3a³+3a²+4a-1
=-3+8-1
=-4
所以,结果与a的取值无关