The expression in the image appears to be:

$\sqrt{\frac{2}{5}}$

Would you like me to simplify or calculate the approximate value of this square root, or provide further explanations?

Here are 5 related questions for further exploration:

1. What is the process for simplifying square roots of fractions?
2. How can the value of $\sqrt{\frac{2}{5}}$ be approximated numerically?
3. What is the importance of rationalizing the denominator in expressions involving square roots?
4. How does $\sqrt{\frac{2}{5}}$ compare to $\sqrt{\frac{3}{5}}$?
5. How is this expression used in geometry or physics?

Tip:

When working with square roots of fractions, remember that $\sqrt{\frac{a}{b}} = \frac{\sqrt{a}}{\sqrt{b}}$.