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

09.06.2025 12:59

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

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Move the nub up to the top:

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Why do so many people seem to hate Nickelback? They're competent and entertaining, and while they certainly aren't the absolute best music, they're still a fun listen.

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Why do I sweat so much after applying moisture or sun screen on my face? I have normal skin.

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

(n - 1)(n + 1)

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n^2 - 1

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

n^2 - n + n - 1

Why does Nickelback, a popular Canadian alternative-rock band, receive so much hate? Is it because they are not considered "edgy" by some people?

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

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

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What happens when your partner doesn't see the value in you and continuously hurts you by searching for something in others knowing it hurts you?

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