Answer:
x ^2 − 9^ 2. hope this helps
(x+9)(x-9)
Step-by-step explanation:
whenever its is x^2
you can start off with
(x+_)(x+_)
then your figure out "what times what" is -81 (they have to be the same number!)
Its -9 and 9
and so you plug that in to get
