Answer :
Answer:
[tex]f(x)=(x-2)(x+2)[/tex]
Step-by-step explanation:
to do it you have to remember the difference of squares
[tex]a^2-b^2=(a-b)(a+b)[/tex]
so we have
[tex]f(x)=x^2-4\\\\x^2\longrightarrow x^2\\\\4\longrightarrow 2^2\\\\f(x)=x^2-2^2\\\\=(x-2)(x+2)\\\\\longrightarrow f(x)=(x-2)(x+2)\longleftarrow\\\dagger[/tex]