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

13.06.2025 14:39

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

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

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

How do you view men and women who cheat?

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n^2 - 1

Are there any men who have sex with male dogs?

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

n^2 - n + n - 1

Move the nub up to the top:

What kind of lights would you like to use for your home decor?

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What is world history that not many people know about?

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

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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Why do you think Filipinos are conservatives?

(n - 1)(n + 1)