Question

Please please please please help

Answer 1

`10 {x}^(2) + ( - 18)`

Explanation:

Inserting fx into gx we get

`5(2 {x}^(2) - 5) + 7`

Which then becomes

`10 {x}^(2) - 25 + 7`

And finally the answer is

`10 {x}^(2) - 18`