$-7\sqrt 5-8\sqrt x$
Work Step by Step
The conjugate of $-7\sqrt 5+8\sqrt x$ is found by changing the sign between the two terms to negative. Therefore, the conjugate is $-7\sqrt 5-8\sqrt x$.
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.