Why is (n-1)(n+1)=n^2-1?
14.06.2025 08:43
The basic answer is that you cross-multiply the values in each factor:
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My friend asked my crush and he said my crush hates me but not in a rude way. What does that mean?
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Move the nub up to the top:
Which document should be pointed out to a holocaust denier?
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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
n^2 - 1
(n - 1)(n + 1)
And you are left with almost a square. One less than the square of side n.
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
When writing a novel, how can a character be developed well, but QUICKLY?
n^2 - n + n - 1
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So, that’s a rectangle with sides 2 and 4.