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WAEC - Mathematics (1994 - No. 22)

Which of the following is not a factors of 2p\(^2\) - 2?
2
p - 1
p + 1
2p - 2
2p + 1

解释

2p\(^2\) - 2 

2(p\(^2\) - 1)

= 2(p + 1)(p - 1)

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