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The Difference of Squares: Parity Note
Difference of Squares x^2 - a^2 has a shortcut in (x+a)*(x-a). For some applications, which employ a parity check, there is a shortcut to that, too.…
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Some Questions Have Answers
Take this question, for example: I have a question for all you techies out there: how (and why) do the cords of earbuds for cellphones…
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Figuring Backwards, and Being Shocked at the Numbers
From a Mortgage Broker in Tuscon: The Effective Rate calculation is a measure of the actual interest rate consumers pay on their home loans by…
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