How do I factor 25n^2 - 16?

If you know the rule that x^2 - y = (x+y) (x-y), this will be easier.

First you want to square root the equation

Square Root of 25 = 5

Square Root of 16 = 4

Square root of n^2 = n

Then you put it together like this:

(5n+4) (5n-4)