F(X)=-6-1 AND G(X)=4X^2 WHAT WOULD THE SOLUTION FOR (FG) (X) BE.

im stuck between
-24x^2-1 or -24x^3-4x^2

(fg)(x) = f(x)*g(x) = 4x^2(-6x-1) = -24x^3-4x^2