D1 - Jan 2010 - Edexcel Decision Mathematics 1 - Question 7

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D1 - Jan 2010 - Edexcel Decision Mathematics 1 - Question 7

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You are by far the best teacher on YouTube, you make it so clear.

Such a great Mathematician!

NerdNish
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So, if I did check each corner, how would I know the best solution. Would i be the largest value for x+y?

Wibble