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

Last Updated: 19.06.2025 16:07

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

n^2 - n + n - 1

Move the nub up to the top:

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What does it mean if someone asks if it’s pink?

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

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My cantankerous beagle is very badly behaved at the dog park and always starts barking at the other dogs. Would pepper spray be an effective method to correct his inappropriate behavior?

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

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

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To those people in the world who have access to universal healthcare, what experiences could you share with Americans in order for us to understand how it affects your life (positively or negatively)?

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

Who are the IT boys of the 1st, 2nd, 3rd, and 4th generation in K-pop?

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(n - 1)(n + 1)

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What parts of the Bible, if any, are inappropriate to read to children? Why?

n^2 - 1