Question

$\sqrt[4]{81 - 8.\sqrt[5]{243} } + 15. \sqrt[5]{32} + \sqrt{225}$
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Answer 1

$\sqrt[4]{81 - 8.\sqrt[5]{243} } + 15. \sqrt[5]{32} + \sqrt{225} \\ \\ \sqrt[4]{81 - 8.\sqrt[5]{ {3}^{5} } } + 15. \sqrt[5]{ {2}^{5} } + \sqrt{ {15}^{2} } \\ \\ \sqrt[4]{81 - 8(3)} + 15(2) + 15 \\ \\ \sqrt[4]{57} + 45$

hope it helps