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Why is (n-1)(n+1)=n^2-1?

The basic answer is that you cross-multiply the values in each factor: (n - 1)(n + 1) n^2 - n + n -...

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Why is America so fucked up?

Never been to America in the flesh. Watched alot of movies and videos and documentaries done in Amer...

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How does one succeed in life?

An average man, let's call him Sam’i (that’s my name): Procrastinates a lot. Can’t control his impul...