Work Step by Step
Completing the square in order to write the equation in the form $a(x-h)^2+k$, we find: $$\left(x+3\right)^2+3-3^2\\ \left(x+3\right)^2-6$$ The vertex is $(h,k)$, so we see that the vertex is: $$ (-3,-6)$$
You can help us out by revising, improving and updating this answer.Update this answer
After 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.