Calculate $52$ to the power of $2$ and get $2704$.
$$\sqrt{676+2704}$$
Add $676$ and $2704$ to get $3380$.
$$\sqrt{3380}$$
Factor $3380=26^{2}\times 5$. Rewrite the square root of the product $\sqrt{26^{2}\times 5}$ as the product of square roots $\sqrt{26^{2}}\sqrt{5}$. Take the square root of $26^{2}$.
