Answer
$4\sqrt {3}$
Work Step by Step
First, we write both numbers under the same radical:
$\sqrt {6} • \sqrt {8} = \sqrt {6 • 8}$
Multiply what is under the radical sign:
$\sqrt {48}$
Rewrite $48$ as a product of a perfect square and another factor. We can use $16$ as the perfect square factor:
$\sqrt {16 • 3}$
Take the square root of $16$ to simplify:
$4\sqrt {3}$