Question

How to factorise x squared minus 16

Answer 1

The answer is "(x-4) • (x+4)"

Answer 2

Not sure if this is right but you could have:

x^2 - 4^2

If you simplify further:

it is also a difference of 2 squares giving you: (x + 4)(x - 4)

Therefore x = -4 or 4