Simplify the root.
${}^4\sqrt{256}$

Evaluate the following square root.

$-\sqrt{121}$

Determine if the given square root evaluates to a real number.

$-\sqrt{4}$

Determine if the given square root evaluates to a real number.

$\sqrt{-64}$

Determine if the given square root evaluates to a real number.

$-\sqrt{-25}$

Simplify the root.

${-}^4\sqrt{10,000}$

Simplify the root.

${}^4\sqrt{-625}$

Simplify the root.

${}^5\sqrt{243}$

Simplify the root.

${}^3\sqrt{-125}$