Question

Calcule:
B) $\sqrt[4]{256 .}$$\sqrt{25 - 16}$

Answer 1

$256 = 4^4$

$\sqrt[4]{256} = \sqrt[4]{4^4}$  = 4

$\sqrt{25 - 16 } = \sqrt{9} = 3$

$\sqrt[4]{4^4} . \sqrt{9} = 4 . 3 = 12$