Express the function in the form f \u2218 g \u2218 h if g(x) = 4x and h(x) = x2. What is the value of f(x) if H(x) = 6 \u2212 4x2?
A) 6x + 4x2
B) 6 \u2212 4x2
C) 24x + 4x2
D) 24 \u2212 4x2