Question

Does any one know the answer?

Answer 1

Answer: option C

find f(x) - g(x)

f(x)=
`-9x^2 - 7x + 12`

g(x) =
`3x^2 - 4x -15`

To find f(x) - g(x) we plug in the functions and subtract

`-9x^2 - 7x + 12- ( 3x^2 - 4x -15)`

Remove the parenthesis and change the sign of each term

`-9x^2 - 7x + 12 - 3x^2 + 4x +15`

Combine like terms

`-12x^2 - 3x + 27`

So option C is correct