Work Step by Step
If the vertex of a quadratic function is at $(k,m)$. Then its equation can be $f(x)=(x-k)^2+m$. Hence here the function is $f(x)=(x+1)^2-1$.
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.