Difference Quotient
Algebra
Suppose $f(x) = x^3 + 4x^2 + 6x + 10$. Find the polynomial equivalent to $$\frac{f(x+4)-f(x)}{4}$$
A$3x^2+20x+38$
B$3x^2+20x+36$
C$3x^2+16x+38$
D$3x^2+16x+36$