Q:

Find f(4) when f(x)=4x^2 - 2 x - 4

Accepted Solution

A:
Answer:52Step-by-step explanation:[tex]f(x)=4x^2-2x-4[/tex][tex]f(4)=4(4)^2-2(4)-4[/tex] (I replaced [tex]x[/tex] with [tex](4)[/tex] since we are to find [tex]f(4)[/tex].)[tex]f(4)=4(16)-2(4)-4[/tex]    (By the order of operations, we take care of the exponents before whatever else we have here.)[tex]f(4)=64-8-4[/tex]           (By the order of operations, we take care of the multiplication as we see if left to right.)[tex]f(4)=56-4[/tex]              (By the order of operations, we perform addition/subtraction as we see it left to right.)[tex]f(4)=52[/tex]                 (This completes the simplification.)We could have also put this in our calculator as:4(4)^2 -  2(4)  -  4This would have returned 52.