Question

HELP!!! D:<

Answer 1

\[\huge a^2-b^2=(a-b)(a+b)\]See how the bottom is written as the difference of squares? It can be factored nicely using this rule.

So that should narrow down your options.
Were you able to factor the top? :O

Answer 2

\[\large x^2-16 \quad = \quad x^2-4^2 \quad =\quad (x-4)(x+4)\]Just in case it wasn't clear what I meant by difference of squares :D

Answer 3

no, I'm stuck. I do not know how to do this.