Question

$1) \sqrt[4]{16*625} 2) \sqrt{2} cos(-45а)$

Answer 1

$\sqrt[4]{16*6252}*\sqrt{2}cos(-45а) = \sqrt[4]{16*6252} * \frac{\sqrt{2}}{2} = \sqrt[4]{2^4*6252 * 2^2} * \frac{\sqrt{2}}{2} = 2\sqrt{6252}$