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

Last Updated: 25.06.2025 00:20

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

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Will Ukraine eventually return to Russia's sphere of influence?

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

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

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

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Move the nub up to the top:

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(n - 1)(n + 1)

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I caught my husband of 20 years looking at inappropriate pics of women on TikTok or Instagram. I'm not sure., but when I told him he got mad and made excuses of why they popped up. I then told him how I've snuck on his phone and saw what he's been looking at . We had a horrible big fight. I asked him why did he even marry me when I see the type he likes . Nothing like me, I'm petite, blonde and blue eyes. These women are dark haired dark eyed and have curvy bodies, large breasts, etc. I just don't feel the same about him after this. I can't get over this

If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2

n^2 - n + n - 1

n^2 - 1

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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