#### Answer

$-7\sqrt 5-8\sqrt x$

#### 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 $-7\sqrt 5-8\sqrt x$.

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$-7\sqrt 5-8\sqrt x$

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