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3 August, 13:31

If c & d=c2+d2-4, then 2 & 1 = ?

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  1. 3 August, 13:56
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    Just plug it in:

    c & d = c² + d² - 4

    2 & 1 = 1² + 2² - 4

    = 1 + 4 - 4 = 1
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