【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a
9-a²/a²+6a+9÷a²-3a/a+1/a
(a-3)√1÷3-a
(a 1)(a 2)(a 3)(a
(a2-a)a2-2a-3÷a(a-3)=a(a-1)(a+1)(a
当a=√3时,分式a²-1/a²-2a+1÷a+1/a³-a²的值为?
化简(9-a²)/a²+6a+9÷(a²-3a)/a+3+1/a
a(a-1)(a-2)(a-3)(a-4)因式分解
先化简:(3a+1−a+1)÷a
化简3a×a×a+12a×a-6a-12 a=根号7-1
a^4+a^3-a-1(因式分解)
a(a-3)-(a-1)的平方