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

13.06.2025 23:53

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

The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2

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

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Why is it that when the Democrats absolutely love everyone to be LGBTP, they don't even acknowledge that Barack Obama and his husband Big Mike are homosexual, and he is the first homosexual president of the USA?

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(n - 1)(n + 1)

n^2 - 1

The Labour Party wants to put the Winter fuel allowance and the £800,000 of gifts received by ministers behind us. Is this a real option for the people who will suffer as our new masters unapologeticly feast on freebies?

n^2 - n + n - 1

Move the nub up to the top:

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Why am I sweating so much at night even though my room is really cold?

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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Why would you think you're fit to be a model?

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What is the most sentimental item you inherited from someone dear to you and what does it mean to you?

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