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
其他人气:926 ℃时间:2020-05-23 16:03:27
优质解答
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)
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