Question

Choose the correct sum of the polynomials (4x3 − 2x − 9) + (2x3 + 5x + 3).

Answer 1

as in combine like terms?
\[4x^3+2x^3=6x^3\] for the same reason that 4 thousand dollars and 2 thousand dollars is 6 thousand dollars

Answer 2

\[(4x^3 − 2x − 9) + (2x^3 + 5x + 3)\]
\[4x^3+2x^3+5x-2x+3-9\] now the like terms are adjacent, add them up