Respuesta :

(3x^6+4x+3)+(3x^8+6x)=
3x^6+4x+3+3x^8+6x=
3x^8+3x^6+(4+6)x+3=
3x^8+3x^6+10x+3

Answer: Option C. 3x^8+3x^6+10x+3
you would combine like terms. so the answer is C. 3x^8+3x^6+10x+3. Hope this helps!