Subtract f(x) = 6x2 – 11x from g(x) = 9x2 + 29x + 6.

a. 3x2 - 18x + 6
c. x2 + 40x + 6
b. -3x2 - 40x + 6
d. -3x2 - 40x
what's the correct answer?

g(x) - f(x) = 9x^2 + 29x + 6 - (6x^2 – 11x)

= 9x^2 + 29x + 6 - 6x^2 + 11x
= 3x^2 + 40x + 6

None of your choices match, I suspect a typo either in your post or in your text