(a²+1+2a)(a²+1-2a)还可以化简吗
(1+a)(1-a)+(a-2)²
(2a+b)²-(2a-b)² 还可以因式分解?
计算:(a+2/a²-2a-a-1/a²-4a+4)÷a-4/a
a/a+2-1/a-1÷a+2/a²-2a+1
(a- 2a/a)÷1-a² / a²+a
(a 1)(a 2)(a 3)(a
化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)
1/a+1-a+2/a²-1·a²-2a+1/a²+4a+4.
(2/1+a)-(a-2/a-1)÷(a²-2a/a²-2a+1)等于多少
(4a²-3a)+(2+4a-a²)-(2a²+a-1),其中a=-2
2a(a²+3a-2)-3a(a³+2a²-a+1)等于多少?
已知A=4a²-3a,B=2a²+a-1,求A-2(A-B)