Work Step by Step
When taking the square root of a number, you get a positive and a negative answer. $-2(x+3)^2+11=-151$ $-2(x+3)^2=-162$ $(x+3)^2=81$ $x+3=81$ $x=78$ or $x+3=-81$ $x=-84$. So $x=-84,78$.
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.