(x⼀x-y-2y⼀x-y)*xy⼀x-2y⼀(1⼀x+1⼀y)步骤详细 谢谢

2024-12-16 13:52:30
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回答1:

解:(x/x-y-2y/x-y)×xy/x-2y÷(1/x+1/y)=(x-2y/x-y)×xy/x-2y×xy/x+y=(xy)²/(x²-y²).