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