Plese gotta get right! let f(x)=7x3−2x−12 and g(x)=−3x3−8x2+10x . what is the function rule for (f+g)(x) ? (f+g)(x)=4x6−8x2+12x−12 ((my choice)) (f+g)(x)=4x3−12x2+8x−12 (f+g)(x)=4x6−8x2+8x−12 (f+g)(x)=4x3−8x2+8x−12