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

14.06.2025 20:13

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

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

Why is it important for Hollywood celebrities to come out against Trump?

n^2 - n + n - 1

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

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

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

How do I complain on a boy coming to marriage with me without my involvement despite no connection with him though he had an illegal affair?

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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Why are leftist movements so popular among young people?

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(n - 1)(n + 1)

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What is the word for truth and its meaning in Koine Greek?

Move the nub up to the top: