Find and simplify the expression if

Answer:
[tex] f ( 2 x ) = 4 x ^ 2 - 8 [/tex]
Step-by-step explanation:
We are given the following expression and we are to simplify the given function:
[tex] f ( x ) = x ^ 2 - 8 [/tex]
Applying the function [tex]f(2x)[/tex] on [tex] f ( x ) = x ^ 2 - 8 [/tex] to get:
[tex] f ( 2 x ) = ( 2 x ) ^ 2 - 8 [/tex]
[tex] f ( 2 x ) = 4 x ^ 2 - 8 [/tex]