来自宋鸿飞的问题
【数学因式分解计算题[(-x+y)/(x²-y²)]-[(-x-y)/(x+y)²]】
数学因式分解计算题
[(-x+y)/(x²-y²)]-[(-x-y)/(x+y)²]
1回答
2020-04-24 22:16
【数学因式分解计算题[(-x+y)/(x²-y²)]-[(-x-y)/(x+y)²]】
数学因式分解计算题
[(-x+y)/(x²-y²)]-[(-x-y)/(x+y)²]
[(-x+y)/(x²-y²)]-[(-x-y)/(x+y)²]
=[-(x-y)/(x+y)(x-y)]-[-(x+y)/(x+y)²]
=[-1/(x+y)]+[1/(x+y)]