SOLUTION
We want to find the sum of
[tex]\begin{gathered} 3x^6+4x+3+ \\ 3x^8+6x \end{gathered}[/tex]
We will first arrange the entities starting with the ones with the highest powers of x we have
[tex]3x^8+3x^6+4x+6x+3[/tex]
Adding the like terms we have
[tex]3x^8+3x^6+10x+3[/tex]
Hence, the answer is
[tex]3x^8+3x^6+10x+3[/tex]
Option D
