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

Last Updated: 19.06.2025 00:25

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

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

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n^2 - 1

If you were to bet, will Canada bend over to Trump's America demands or remain inflexible until the last day of his Presidency on January 20, 2029? Will America or Canada win this geopolitical arm-wrestling? I'm rooting for America.

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

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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

From an axiology/value theory point of view, how can one say that a diverse society is better than a uniform one, especially given the negative effects of diversity (racism, sectarian conflict, problems arising from extreme cultural relativism)?

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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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(n - 1)(n + 1)

Is 1500 calories enough for a 5’3 15-year-old who is non-active?

Move the nub up to the top:

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

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n^2 - n + n - 1