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

Last Updated: 17.06.2025 00:49

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

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

n^2 - n + n - 1

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Why is there so much free porn on the internet?

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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

How can couples reverse the buildup of resentment once they notice it?

Move the nub up to the top:

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(n - 1)(n + 1)

How do you get a girl to like you?

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

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Why did lobsters evolve bright colors if they are neither poisonous nor venomous?

n^2 - 1

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

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: