Question

determine o valor da expresão

Answer 1

$27 ^{ \frac{2}{3} } - 16 ^{ \frac{1}{2} } - 4 ^{ \frac{1}{2} } \\ \\ \sqrt[3]{27^2} - \sqrt[2]{16^1} - \sqrt[2]{4^1 } \\ \\ \sqrt[3]{729} - 4 - 2 \\ \\ 9 - 4 - 2 \\ \\ \boxed{3}$