Answer
$2\sqrt {17}$
Work Step by Step
Evaluate the exponents:
$\sqrt {4 + 64}$
Simplify the radicand:
$\sqrt {68}$
Rewrite the radicand as the product of a perfect square and another factor:
$\sqrt {4 \cdot 17}$
Take the square root of the perfect square to remove it from under the radical sign:
$2\sqrt {17}$
