化简a(a+2)-(a-1)(a+1)
化简a(a+2)-(a-1)(a+1)
化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)
化简:(1-a)^2/a-1 (a
化简[a^2+a/a^2-1+(a^2-a分之根号下a^2-2a+1)
(a 1)(a 2)(a 3)(a
(2+1/a-1-1/a+1)÷(a-a/1-a²)化简
化简:a/a-1÷(a-1/a)等于
(a+2)(a-2)-a(a+1)化简
化简:2(a+1)-a
化简:(a+1)(a
(高一集合)已知A={2,4,a*a*a-2a*a-a+7},B={1,a+3,a*a-2a+2,a*a*a+a*a+3
(a+1/a)*=a*+2+1/a* (a-1/a)*=a*-2+1/a*