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

Last Updated: 16.06.2025 02:34

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

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

I am still studying engineering. I feel worried being an average student. Can I get a good job in placement, buy a house, and a car? I don't know why I feel this.

n^2 - n + n - 1

(n - 1)(n + 1)

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What is the irony of life according to you?

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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

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

n^2 - 1

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Do you anal play alone?

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

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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What frustrates you the most?

Move the nub up to the top: