Thread: The end of the world cometh - 4 boney dudes on horseback spottedby Daily Mail readers...
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Tim Watts[_3_] Tim Watts[_3_] is offline
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Default The end of the world cometh - 4 boney dudes on horseback spottedby Daily Mail readers...
On 05/06/15 15:19, Tim Streater wrote:
In article , Tim Watts
wrote:

Prove that: n^2-n-90=0

For n = -9 or n = 10, easy enough to do in one's head.


https://twitter.com/hashtag/edexcelmaths

makes depressing reading...
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