Answer:
3, 0
Explanation:
So, if we rewrite our given equation to have its 0x its easier to picture factorising it.
Factorise into (x+3)(x-3)
Make this equation equal to zero
Solve for your two pairs, -3, 0 (which was given in the question- I wrote this in green)
and 3, 0 (I wrote this in blue)