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

14.06.2025 00:04

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

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

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Move the nub up to the top:

n^2 - 1

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Why are girls supposed to have a stereotypical "hourglass" body shape, and why if you dont have an "hourglass" body shape you get treated differently? It doesnt make any sense to me.

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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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What happened to your school bully?

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

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Why are men ridiculously delusional in the women they want/approach? I'm not a troll. This is a real question. Why does a fat, pot bellied, unkempt, balding, stupid (ergo poor) man, tell a woman above his league that she isn't hot enough for him?

(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

n^2 - n + n - 1

What is the difference between the terms "Millennials" and "kids"?

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