Star and Pound Operations
Pro Problems > Math > Number and Quantity > Number Theory > Star OperationsStar and Pound Operations
If a * b = (a + b)2, and a # b = (a - b)2, find x such that (2 * x) # (x * 1) = 81
Solution
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Guess the Star
There exists a star (*) operation for which the following equations are true:
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