(a+2/a-2)*(1/a²+2a)
(a- 2a/a)÷1-a² / a²+a
化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)
化简a(a+2)-(a-1)(a+1)
(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
先化简,再求值:【(a-2/a²+2a)-(a-1/a²+4a+4)】÷(a-4/a+2),其中a=
计算 (a²+2a分之a-2 - a²+4a+a分之a-1 ) ÷ a+2分之a-4
计算 看图 (a²+2a分之a-2 - a²+4a+a分之a-1 )÷ a+2分之a-4
计算:a²+9-6a分支2a²-4a-6/(4a+8)×4+3a-a²分支6+a-a
(a+1/a)*=a*+2+1/a* (a-1/a)*=a*-2+1/a*
(2+1/a-1-1/a+1)÷(a-a/1-a²)化简
计算:(2a+3)(a²+a-1)
计算:-2a(a²b+a-1)