The correct sum of the polynomial is [tex]\rm 6x^3 + 3x - 6[/tex].
We have to determine
The correct sum of the polynomials.
Sum of the polynomials is just a matter of combining like terms, with some order of operations.
Then,
The correct sum of the polynomial is;
[tex]\rm (4x^3 - 2x - 9) + (2x^3 + 5x + 3) \\\\ 4x^3 - 2x - 9 + 2x^3 + 5x + 3\\\\ 6x^3 + 3x - 6[/tex]
Hence, the correct sum of the polynomial is [tex]\rm 6x^3 + 3x - 6[/tex].
To know more about the sum of the polynomial click the link is given below.
https://brainly.com/question/9465649
