Question

Need help with part b. Thanks!

Answer 1

`(x-4)^(2)`>0

`(x-4)^(2)`+4>0

so the function is always positive.

Explanation:

As
`(x-4)^(2)` always positive, because when you square numbers you will get always a positive number.

So
`(x-4)^(2)`+4>0, because the (+4) will not effect the answer as (x-4)^{2} will be positive.