Work Step by Step
Separate the radical to make the expression easier to simplify. $-21\times\sqrt 9\times\sqrt 3\times\sqrt x^9$ Simplify $-21\times 3\times\sqrt 3\times x^3$ Answer: $-63x^3\sqrt 3$
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.