Question

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Answer 1

\(\bf \large {4\sqrt[4]{5}+7\sqrt[3]{5}-9\sqrt[3]{5}+6\sqrt[4]{5}\qquad \textit{let}\quad \sqrt[4]{5}=a\qquad \sqrt[3]{5}=b\\ \quad \\
4\sqrt[4]{5}+7\sqrt[3]{5}-9\sqrt[3]{5}+6\sqrt[4]{5}\implies 4a+7b-9b+6a\\\quad \\\implies 4a+6a+7b-9b}\)