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

14.06.2025 00:01

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

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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

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My boyfriend always verbally abuse me and makes me cry. If I try to tell him how hurt I was, he says to me he loves me and can't hurt me but always abuse me. Why?

(n - 1)(n + 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

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

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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.

How do people who are deaf learn sign language? Is it typically taught by parents at a young age or are there programs available for learning it later in life?

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n^2 - 1

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What is the meanest thing your husband has said to you?

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

How could NASA possibly land on the moon when it's impossible to reach the moon through the Earth's dome? Why are they making up such an obvious lie?

n^2 - n + n - 1