#### Answer

$7\sqrt{3y}$

#### Work Step by Step

RECALL:
For any real numbers $a, b,$ and $c$,
$ac-bc=(a-b)c$
Use the rule above to combine like terms:
$=(8-1)\sqrt{3y}
\\=7\sqrt{3y}$

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

$7\sqrt{3y}$

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