Why is (n-1)(n+1)=n^2-1?
14.06.2025 04:17
(n - 1)(n + 1)
So, that’s a rectangle with sides 2 and 4.
n^2 - 1
Why does the UK Labour MP Jess Philips seem to be such a divisive figure?
xx
xxx x
xxx
The basic answer is that you cross-multiply the values in each factor:
xxx x
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
If there exists a “New York of Australia”, is it Sydney or Melbourne?
xxxx
xxxx
xxx
What are the most common signs that a partner will cheat before it happens?
Move the nub up to the top:
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
And you are left with almost a square. One less than the square of side n.
What were some of the unforgettable incidents from your school life?
n^2 - n + n - 1