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

12.06.2025 01:45

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

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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.

(n - 1)(n + 1)

Why do narcissists want to hurt your feelings, even after they discard you?

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

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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

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Which document should be pointed out to a holocaust denier?

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.

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Im a 14 year old girl who doesnt want to wear a hijab but my parents force me to wear one. It makes me dislike it more. Im not ready for one no matter what people say and they get really mad at me. I have bad grades and no motivation. What do I do?

n^2 - n + n - 1