Why is (n-1)(n+1)=n^2-1?
Last Updated: 18.06.2025 00:14

xxx
So, that’s a rectangle with sides 2 and 4.
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
xxx
xxxx
Why did the American's mulberry harbor not hold up after D-Day?
xx
xxx x
xxxx
Nicholas Galitzine Says Masters of the Universe Has Wrapped Production - Variety
n^2 - n + n - 1
n^2 - 1
Move the nub up to the top:
Were knights’ lances practical weapons, or were they just for sports?
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 - 1)(n + 1)
When gallery photos are deleted at the same time, why are Google photos also deleted?
And you are left with almost a square. One less than the square of side n.