(a-1)(a²+a+1)怎么解!
(a-1)(a²+a+1)怎么解!
a³+a²+a+1怎么因式分解?
(a+1)²+(a²+a)²用分解因式怎么解 急用.快
1/a(a+1)+1/(a+1)(a+2)+1/(a+2)(a+3)……1/(a+2009)(a+2010)怎么解
根号a²-2a+1除以a²-a怎么化简
(a+1/a+b)^2-(a-1/a+b)^2怎么解啊
1、a+b/2a+2b - a²+b²/a²-b² 怎么= -a²-2
a-1+1/a 怎么化简
9-a²/a²+6a+9÷a²-3a/a+1/a
(a²+a+1-a³/a-1)×(1+a-4a/1+a)
1/a-a=1怎么算 a等于多少
a(a²-a-1)+1