Question

What is (f-9)(x)?

f(x) = 4x + 2
g(x) = x² + 8x
Write your answer as a polynomial or a rational function in simplest form.
A) 4x−7
B) 4x−11
C) x² −4x−7
D) x²−4x−11

Answer 1

To find (f-9)(x), substitute f(x) = 4x + 2 into the expression. The answer is 4x^2 - 7x (option D).

Step-by-step explanation:

To find (f-9)(x), we need to substitute the function f(x) = 4x + 2 into the expression.

(f-9)(x) = (4x + 2 - 9)(x) = (4x - 7)(x) = 4x^2 - 7x.

Thus, the answer is 4x^2 - 7x which is option D.