Notice that:
[tex]\begin{gathered} 36=6^2, \\ 64=8^2, \\ 225=15^2, \\ 169=13^2\text{.} \end{gathered}[/tex]
Therefore:
[tex]\begin{gathered} \sqrt[]{36}=6, \\ \sqrt[]{64}=8, \\ \sqrt[]{225}=15, \\ \sqrt[]{169}=13. \end{gathered}[/tex]
Answer:
[tex]\begin{gathered} \sqrt[]{36}=6, \\ \sqrt[]{64}=8, \\ \sqrt[]{225}=15, \\ \sqrt[]{169}=13. \end{gathered}[/tex]
