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

11.06.2025 00:08

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

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Why would Joseph Smith say that polygamy was God's law?

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

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

(n - 1)(n + 1)

What are you struggling with in your life? What would you like to have instead?

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n^2 - 1

What if you were the only and last person left on Earth. How will you survive and what would you do with your life?

Move the nub up to the top:

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

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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

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n^2 - n + n - 1

I vibrated my dogs shock collar while it was eating my other dog’s food and now it won’t eat. How do I fix this problem?

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