Why is (n-1)(n+1)=n^2-1?
10.06.2025 12:05

xx
xxx
n^2 - n + n - 1
Why do girls in Indian top colleges wear shorts?
xxxx
xxx x
Move the nub up to the top:
n^2 - 1
xxx
xxxx
xxx x
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.
Have you ever dealt with a Christian narcissist?
(n - 1)(n + 1)
The basic answer is that you cross-multiply the values in each factor:
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
Regeneron Pharmaceuticals Crashes 19% On A Surprise Sanofi-Tied Failure - Investor's Business Daily
And you are left with almost a square. One less than the square of side n.