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

Last Updated: 17.06.2025 04:38

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 - 1)(n + 1)

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Why are so many US conservatives in this day and age still against racial mixing? They won't say it in public, but they are still against the mixing between Blacks and whites? Why?

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

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Why, after a divorce, would one still want to ruin the other one’s life?

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n^2 - n + n - 1

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

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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

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

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How come Taiwan is LGBT friendly, yet Japan and South Korea are not?

n^2 - 1

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My girlfriend told me that she wants to move in with me. I have my own apartment and I like my peace and quiet, but I also love her. We've been together for a year now. What should I do?

Move the nub up to the top: