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

13.06.2025 12:49

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

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

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

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Liberals, why don't you like Conservatives?

n^2 - n + n - 1

(n - 1)(n + 1)

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How long would you let a homeless friend stay at your house?

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

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What can you do if someone makes a false accusation against you?

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

n^2 - 1

What does it mean when someone leaves something in your house, your room to be exact, and when you tell them, they say they left it there on purpose?

Move the nub up to the top:

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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

Why do people hate on Serena (anime character)? What did she ever do to anyone except be a good friend to Ash Ketchum and an awesome trainer herself?

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