Question

A= 3√64 + 5√-243 - 49 elevado a 1 quinto

Answer 1

Olá.

$\mathsf{A=\sqrt[3]{64}+5\sqrt[5]{-243}-49^{\frac{1}{2}}}\\\\\boxed{\mathsf{a^{\frac{m}{n}}=\sqrt[n]{m}}}\\\\\mathsf{A=\sqrt[3]{2^6}+5\sqrt[5]{-3^5}-\sqrt[2]{49^1}}\\\mathsf{A=\sqrt[3]{2^6}+5\sqrt[5]{-3^5}-\sqrt[2]{7^2}}\\\mathsf{A=2^3+5\cdot-3-7}\\\mathsf{A=8-15-7}\\\mathsf{A=8-22}\\\boxed{\mathsf{A=14}}$

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Bons estudos.