来自范瑛的问题
化简:a²-2ab+b²/a²-b²+b/a+b
化简:a²-2ab+b²/a²-b²+b/a+b
1回答
2020-09-20 21:48
化简:a²-2ab+b²/a²-b²+b/a+b
化简:a²-2ab+b²/a²-b²+b/a+b
a²-2ab+b²/a²-b²+b/a+b
=(a²-2ab+b²)/(a²-b²)+b/(a+b)
=(a-b)²/[(a+b)(a-b)]+b/(a+b)
=(a-b)/(a+b)+b/(a+b)
=a/(a+b)