答案:E
解析:
If p is an odd integer, then p minus 2 and p^2 are odd integers. Similarly, choices (C) and (D) are odd integers. Since an odd integer subtracted from another odd integer is always an even integer, p^2 minus p is even.
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答案:E
解析:
If p is an odd integer, then p minus 2 and p^2 are odd integers. Similarly, choices (C) and (D) are odd integers. Since an odd integer subtracted from another odd integer is always an even integer, p^2 minus p is even.