分式约分 x²+2x+1分之x²+x a²-b²分之a+b
人气：282 ℃ 时间：2019-10-17 03:10:51
解答
原式=(x+1)²分之x(x+1)
=(x+1)分之x
原式=(a+b)(a-b)分之(a+b)
=(a-b)分之1
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