Question

If f(x) = x^2 -5x +1 and g(x) =5x+4 what is the value of g•f (-2)

Answer 1

The value of
`gof (-2)=79`

Explanation:

We have

`f(x) = x^2 -5x +1 \\\\f(-2) = (-2)^2 -5*-2 +1 \\\\=15`

Now we need to find

`gof (-2)=g(15)`

`g(15) =5*15+4\\\\=79`