Simplify fourth root of 256*81

$\sqrt[4]{256 \cdot 81}$

Step 1

Multiply $256$ by $81$ .

$\sqrt[4]{20736}$

Step 2

Rewrite $20736$ as $12^{4}$ .

$\sqrt[4]{12^{4}}$

Step 3

Pull terms out from under the radical, assuming positive real numbers.

$12$