Answer
$ y^2 -18y + 81$
Work Step by Step
$(y-9)^2 = y^2 - 2 (9) (y) +9^2 = y^2 -18y + 81$
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.