x≠1Quantity A:$$\frac{x^2-2}{x-1}$$Quantity B:x+2

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x≠1

Quantity A:$$\frac{x^2-2}{x-1}$$

Quantity B:x+2

答案：D

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用A-B, 得到 (-x)/(x-1), 是负的, 所以选B. 为什么正确答案是D呢?

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