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

Last Updated: 28.06.2025 11:28

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

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How long will it take for Canada and the US to become close friends and allies again once the tariff problem is resolved?

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

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(n - 1)(n + 1)

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

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

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n^2 - n + n - 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

Sorry, Trump supporters, but eventually it will have to be asked: Why didn't Trump do as well in his first term as he is doing NOW?

Move the nub up to the top:

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

n^2 - 1

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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