请你说明:(a^3+3a^2+4a-1)+(a^2-3a+a^3-3)+(8-a-4a^2-2a^3)的值与a无关
问题描述:
请你说明:(a^3+3a^2+4a-1)+(a^2-3a+a^3-3)+(8-a-4a^2-2a^3)的值与a无关
答
拆括号:a^3+3a^2+4a-1+a^2-3a+a^3-3+8-a-4a^2-2a^3
=3a^2+4a-1+a^2-3a-3+8-a-4a^2
=4a-1-3a-3+8-a
=4
所以原式的值与a无关