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

Last Updated: 20.06.2025 09:36

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

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

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I am so tired of ignorant people like you calling us far rights, why democrats is so educated, they take things from their own mouth, you guys are totalitarian party?

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

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

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When a dog smells another dog’s poo or wee, do they then remember that scent for when they smell it again, or even further know which dog they are smelling if they know the dog?

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

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

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Why do Democrats never produce a good argument for why Trump was a bad president?

Move the nub up to the top:

n^2 - n + n - 1

(n - 1)(n + 1)

How strict are your parents?

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n^2 - 1

How do I stop my 12-year-old daughter from crying herself to sleep? I have punished her and she still does it.

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