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

Last Updated: 21.06.2025 03:06

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

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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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Why are flat Earthers made fun of when they seemingly don't exist? I have only met one flat Earther in 18 years.

Move the nub up to the top:

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(n - 1)(n + 1)

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

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How do I seduce my sister? (I am an Indian) I want to have sex with her.?

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

n^2 - 1

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Why do liberals think same-sex marriage is alright? The Bible makes it very clear that it's not alright to be gay, why can't liberals understand that?

n^2 - n + n - 1

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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I see ugly guys dating gorgeous, "hot" women all the time. I, too, am not very attractive but I'm not doing well with the ladies. What's their secret?

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