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

14.06.2025 13:31

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.

My cantankerous beagle is very badly behaved at the dog park and always starts barking at the other dogs. Would pepper spray be an effective method to correct his inappropriate behavior?

n^2 - 1

Move the nub up to the top:

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

Should I have left it alone and kept quiet? I came out as gay to my adult kids last week. Age 61 married 15 years, divorced for 20. I feel so guilty for ruining their lives by living a lie.

n^2 - n + n - 1

(n - 1)(n + 1)

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Are you afraid of being alone?

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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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J.K. Rowling said that 65% of people in Britain are transgender. Where did she come up with that statistic?

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

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How many couples swap wives?

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