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

11.06.2025 05:31

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

(n - 1)(n + 1)

The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2

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Are there any industries or sectors where ChatGPT is particularly well-suited for implementation?

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If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2

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Why is it common for guys to sleep with 10-20 women then marry a good girl?

Move the nub up to the top:

n^2 - n + n - 1

n^2 - 1

Why do almost all vertebrates have tails, but not apes and frogs?

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And you are left with almost a square. One less than the square of side n.

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I refuse to date any women that are social media influencers, content creators, TikTok celebrities, and use Only fans. Would this be seen as normal, or would I be going too far? Why?

So, that’s a rectangle with sides 2 and 4.

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Why does my best friend call me ugly and act like she’s joking, but today she looked at me and said “I wouldn’t lie to you”? What should I say back to her?

The basic answer is that you cross-multiply the values in each factor: