Question

Resolva as expressões: a)8³-5 √400 e b) (-2)5+ ³√125

Answer 1

$a)8 \times 8 \times 8 - 5 \times \sqrt{20 \times 20} = 512 - 5 \times 20 = \\ 512 - 100 = 412 \\ b) - 2 \times 5 + \sqrt[3]{125} = - 10 + \sqrt[3]{5 \times 5 \times 5} = - 10 + 5 = - 5$