Answer
$x^2$, with $x=-2$ excluded from the domain
Work Step by Step
$\frac{x^3+2x^2}{x+2}=\frac{x^2(x+2)}{x+2}=x^2$
$x=-2$ must be excluded from the domain, because $(-2)+2=0$ and you can't have a denominator that equals zero.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.