Question

Find the product: (x + 2)( x − 2)

Answer 1

\[(a+b)(a-b)= a^2-b^2\]

Answer 2

I just figured I would do this in detail

(x + 2)(x - 2)
x * x= x^2
x * -2= -2x
2* x= 2x
2* -2= -4
x^2 - 2x + 2x -4 (the 2x are cancelled out)
x^2 -4