To find f(x) - g(x), we subtract the corresponding terms of the two functions.
f(x) = 7x³ + 11x² + 15x + 23
g(x) = 5x³ + 11x² - 15x - 2
Now, let's subtract the terms:
(7x³ - 5x³) + (11x² - 11x²) + (15x - (-15x)) + (23 - (-2))
Simplifying each term, we get:
2x³ + 0x² + 30x + 25
Therefore, f(x) - g(x) = 2x³ + 30x + 25.