resposta:
Resolução:
$\; \sqrt[\large 3]{8a^{\large 4}}\,=\,\sqrt[\large 3]{8\,\centerdot\,a^{\large 3}\,\centerdot\,a}\,$ $=\,\sqrt[\large 3]{8}\,\centerdot\,\sqrt[\large 3]{a^{\large 3}}\centerdot\,\sqrt[\large 3]{a}\,=\,2\,\centerdot\,a\,\centerdot\,\sqrt[\large 3]{a}\;$
Resposta:
$\;2a\,\sqrt[\large 3]{a}\;$
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