Question

How do you evaluate the function `f(x)=4x-3` and `g(x)=x^2+5x+3` for `f(2)-g(4)`?

Answer 1

`-34`

Explanation:

`f(x)=4x-3`
`f(2)=4(2)-3 =5`
'~~~~~~~~~~~~~~~~~~~~~~~~~
`g(x)=x^2+5x+3`
`g(4)=4^2+5(4)+3 =16+20+3=39`
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
So `f(2)-g(4) = 5-39 = -34`