1.

⁴√81−8 ³√343+15⁵√32+√225 ,Simplifyit.

Answer»

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= > \sqrt[4]{81} - 8 \sqrt[3]{343} + 15 \sqrt[5]{32} + \sqrt{225} \\ \\ = \sqrt[4]{ {3}^{4} } - 8 \sqrt[ 3 ]{ {7}^{3} } + 15 \sqrt[5]{ {2}^{5} } + \sqrt[2]{ {15}^{2} } \\ \\ = 3 - 8 \times 7 + 15 \times 2 + 15 \\ \\ = 3 - 56 + 30 + 15 \\ \\ = - 8
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