Why is (n-1)(n+1)=n^2-1?
08.06.2025 01:51
xxx x
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
n^2 - n + n - 1
And you are left with almost a square. One less than the square of side n.
So, that’s a rectangle with sides 2 and 4.
xxx x
xxx
xxx
State of Play Confirmed for 4th June, 40+ Minutes of PS5 Games - Push Square
Move the nub up to the top:
xx
n^2 - 1
Steelers Address Mason Rudolph Trump Rally Appearance In Email To Fans - TMZ
xxxx
xxxx
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
Why the end of Google as we know it could be your biggest opportunity yet - ZDNet
(n - 1)(n + 1)