化简a²/a-1 +a+1
化简:(a+1)(a
化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)
9-a²/a²+6a+9÷a²-3a/a+1/a
(a²+a+1-a³/a-1)×(1+a-4a/1+a)
化简3a×a×a+12a×a-6a-12 a=根号7-1
化简(1 - 1/a-1)÷a²-4a+4/a²-a
化简:a²-1分之a²+2a+1 -a+1分之a
(2+1/a-1-1/a+1)÷(a-a/1-a²)化简
(1)化简:-a²-a³-a²+a³-a²
a²-4a+4分之a²-4×a+2分之a+1-1 化简
已知|a|+a=0,化简|1-a|+根号下(a-2)² +2a
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)