Respuesta :

Zeol

Answer:

x^2 - 9

Step-by-step explanation:

For this you would use the method FOIL

First

Outside

Inside

Last

(x+3)(x-3)

First, [x] times [x] = x squared (x^2)

Then, Outside, which is -3x

Inside = 3(x) = 3x

Lastly, 3(-3) = -9

x^2 - 3x + 3x - 9

x^2 - 9