[tex]a) \sqrt{2.56} \\ \sqrt{ \frac{64}{25} } \\ \sqrt{ \frac{8}{5} } [/tex]
[tex]b) \sqrt[3]{729} \\ \sqrt[3]{ {9}^{3} } \\ 9 \\ [/tex]
[tex]c) \sqrt{128} \\ {2}^{ 3} \sqrt{2} \\ 8 \sqrt{2} [/tex]
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[tex]a) \sqrt{2.56} \\ \sqrt{ \frac{64}{25} } \\ \sqrt{ \frac{8}{5} } [/tex]
[tex]b) \sqrt[3]{729} \\ \sqrt[3]{ {9}^{3} } \\ 9 \\ [/tex]
[tex]c) \sqrt{128} \\ {2}^{ 3} \sqrt{2} \\ 8 \sqrt{2} [/tex]