Answer: option C
find f(x) - g(x)
f(x)= [tex]-9x^2 - 7x + 12[/tex]
g(x) = [tex]3x^2 - 4x -15[/tex]
To find f(x) - g(x) we plug in the functions and subtract
[tex]-9x^2 - 7x + 12- ( 3x^2 - 4x -15) [/tex]
Remove the parenthesis and change the sign of each term
[tex]-9x^2 - 7x + 12 - 3x^2 + 4x +15 [/tex]
Combine like terms
[tex]-12x^2 - 3x + 27 [/tex]
So option C is correct
