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

14.06.2025 04:35

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

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n^2 - 1

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How do flat earthers explain the Earth being stationary? Is this concept considered impossible?

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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

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What are some alternatives to wearing a bra? Why do some women feel pressure to wear bras even though there may not be any benefits?

(n - 1)(n + 1)

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

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

How do you leave a relationship when you are still in love?

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

Move the nub up to the top:

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Why do Democrats keep calling Patriots/President Trump supporters "sore losers"? Do they purposefully ignore the massive fraud that took place, or genuinely think that there was zero fraud?

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n^2 - n + n - 1

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

How can someone determine if their partner is in another romantic relationship, particularly if they do not live together?

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