Question

(x + 2)(x - 2)

Answer 1

Will you take care of this freckles?

Answer 2

Recall in your earlier post that:
\[(x-y)(x+y)=x(x+y)-y(x+y)=x(x)+x(y)-y(x)-y(y)\]
\[=x^2+xy-xy-y^2=x^2-y^2 \]

Answer 3

\[(x-y)(x+y)=x^2-y^2 \]

Answer 4

So you are multiplying conjugates all you have to do is do
the first^2-last^2