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A sum.

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styley | 22:17 Tue 08th May 2007 | Quizzes & Puzzles
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Given that (x)*(2)=2x, can you find the answer to this sum. (x-a)*(x-b)*(x-c)*........(x-y)*(x-z)=?
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Quite an old chestnut this one - the phrase (x-x) appears in the sum, so therefore the answer is zero.

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A sum.

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