Question

5 raiz cubica de 54 menos raiz cubica de 16

Answer 1

$5 \sqrt[3]{54} - \sqrt[3]{16 } = 5 \sqrt[3]{2 \times {3}^{3} } - \sqrt[3]{2 \ \times {2}^{3} } \\ = 5 \times 3 \sqrt[3]{2} - 2 \sqrt[3]{2} = 15 \sqrt[3]{2} - 2 \sqrt[3]{2} = (15 - 2) \sqrt[3]{2} = 13 \sqrt[3]{2}$