To find the correct polynomial identity resulting from dividing \( x^3 + a^3 \) by \( x + a \), we can apply polynomial long division or use the factorization of the sum of cubes.
The expression \( x^3 + a^3 \) can be factored using the identity:
\[ x^3 + a^3 = (x + a)(x^2 - ax + a^2) \]
From this factorization, we can see that \( x + a \) is a factor, and when we divide \( x^3 + a^3 \) by \( x + a \), we are left with the quotient:
\[ x^2 - ax + a^2 \]
Thus, the answer corresponds to Option #2.
Therefore, the correct option is:
Option #2: x² - ax + a²