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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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How do I get off Paxil?

Section 2 of 8:What can I do to manage side effects? 1. Get rest if you're feeling fatigued or drows...

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Why is North Korea a jail?

IT IS A JAIL I am a Chinese, a follower of Chairman Mao, and I believe in communism. However, North...