作业帮分式加减计算a²+3/a²-1 -a+1/a-1 +1
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/12 17:51:05
分式加减计算a²+3/a²-1 -a+1/a-1 +1
分式加减计算a²+3/a²-1 -a+1/a-1 +1
分式加减计算a²+3/a²-1 -a+1/a-1 +1
原式=(a²+3)/(a+1)(a-1)-(a+1)²/(a+1)(a-1)+(a+1)(a-1)/(a+1)(a-1)
=(a²+3-a²-2a-1+a²-1)/(a+1)(a-1)
=(a²-2a+1)/(a+1)(a-1)
=(a-1)²/(a+1)(a-1)
=(a-1)/(a+1)