Why is (n-1)(n+1)=n^2-1?
13.06.2025 02:21

xxx x
So, that’s a rectangle with sides 2 and 4.
xxx
High-Average, Low-Slugging Hitters Are Back, and Baseball Is Better for It - Sports Illustrated
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
NASA’s Chandra Sees Surprisingly Strong Black Hole Jet at Cosmic “Noon” - NASA (.gov)
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
xx
xxx x
Are narcissists happy people generally?
(n - 1)(n + 1)
n^2 - n + n - 1
xxxx
I feel like my boyfriend doesn't love me. Why?
The basic answer is that you cross-multiply the values in each factor:
And you are left with almost a square. One less than the square of side n.
Move the nub up to the top:
What Happens to Your Blood Pressure When You Eat Grapefruit Every Day? - Verywell Health
n^2 - 1