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

14.06.2025 01:02

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

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n^2 - 1

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Who believes that Speaker Mike Johnson will certify ‘a free and fair and legal election'? Who believes that Speaker Mike Johnson will NOT certify ‘a free and fair and legal election'? Why?

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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

(n - 1)(n + 1)

Why aren't you a Trump supporter?

n^2 - n + n - 1

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

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

Why are Republicans so brainwashed and oblivious to the fact that a lot of the price increases going on right now is due to corporate greed, not inflation?

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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

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

How do I become an intelligent man?

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Move the nub up to the top:

What do men like to be given for their birthday?

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