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How do you get a girl to like you?

Part 1 of 3:Getting Close to Her 1. Befriend her Think of her as a friend that you like; it will be...

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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 -...