Let f(x)=7x3−2x−12f(x)=7x3-2x-12 and g(x)=−3x3−8x2+10xg(x)=−3x3-8x2+10x .

What is the function rule for (f+g)(x)(f+g)(x) ?


A: (f+g)(x)=4x6−8x2+8x−12(f+g)(x)=4x6−8x2+8x−12

B: (f+g)(x)=4x3−8x2+8x−12(f+g)(x)=4x3−8x2+8x−12

C: (f+g)(x)=4x3−12x2+8x−12(f+g)(x)=4x3−12x2+8x−12

D: (f+g)(x)=4x6−8x2+12x−12