How do you multiply #(x+3)(x-3)+(x+7)(x-3)#?
We can use the FOIL Method,
(First, Outer, Inner, and Last)
Solving the problem,
we can simplify the 1st term,
now apply FOIL method, to the 2nd term.
simplify, by combining like terms,
Plug it all,
combine like terms to simplify again, we must simplify the answer as long as possible.