17. Given the following two functions:
f(x) = 5x² - 2x + 7
g(x) = 2x² + 6x +3
Then, find the following:
f (x) - g(x)

A. 7x²-8x+4
B. 7x² + 4x + 10
C. 3x² + 4x + 10
D. 3x² - 8x +4