Why is (n-1)(n+1)=n^2-1?
12.06.2025 13:51

The basic answer is that you cross-multiply the values in each factor:
So, that’s a rectangle with sides 2 and 4.
xxx x
How do you recognize when your mental health might need attention?
xxxx
xxx x
n^2 - n + n - 1
Why is going on a date today so much different than it was when I was young?
And you are left with almost a square. One less than the square of side n.
(n - 1)(n + 1)
xxx
Pharmacy group withholds endorsing CDC's latest vaccine recommendations - AOL.com
xx
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
n^2 - 1
xxx
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
xxxx
Have you ever accidentally seen your mother-in-law doing something that was private to her?
Move the nub up to the top: