9-a²/a²+6a+9÷a²-3a/a+1/a化简

来源：学生作业帮助网编辑：作业帮时间：2024/05/10 07:37:21

9-a²/a²+6a+9÷a²-3a/a+1/a化简
9-a²/a²+6a+9÷a²-3a/a+1/a
化简

9-a²/a²+6a+9÷a²-3a/a+1/a化简
9-a²/a²+6a+9÷a²-3a/a+1/a
=(3-a)(3+a)/(a+3)²÷a²[a-3]/[a²+1]
=(3-a)(3+a)(a²+1)/[(a+3)²a²(a-3)]
=-(a²+1)/[(a+3)a²]