Why is (n-1)(n+1)=n^2-1?
13.06.2025 18:47

xx
xxx
xxx
'Really excited about this group': 5 takeaways from Seahawks minicamp - The Seattle Times
So, that’s a rectangle with sides 2 and 4.
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
Japan’s oldest “human” fossils aren’t human at all, says new study - Glass Almanac
n^2 - n + n - 1
Move the nub up to the top:
The basic answer is that you cross-multiply the values in each factor:
Why are FtM trans just another type of woman?
xxx x
xxxx
xxx x
Does turmeric help fight cancer? If so, how?
And you are left with almost a square. One less than the square of side n.
xxxx
(n - 1)(n + 1)
n^2 - 1