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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 -...

Why am I single?

yes. Han Chinese eatting raw food and sleep on floor and only 155cm tall and didn't have chairs unti...

Why is America so fucked up?

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