🎥 Video Solution:
📘 Rationalise:
\[ \frac{1}{2\sqrt{5} – \sqrt{3}} \]
✏️ Solution:
\[ = \frac{1}{2\sqrt{5} – \sqrt{3}} \times \frac{2\sqrt{5} + \sqrt{3}}{2\sqrt{5} + \sqrt{3}} \]
\[ = \frac{2\sqrt{5} + \sqrt{3}}{(2\sqrt{5})^2 – (\sqrt{3})^2} \]
\[ = \frac{2\sqrt{5} + \sqrt{3}}{20 – 3} \]
\[ = \frac{2\sqrt{5} + \sqrt{3}}{17} \]
✅ Final Answer: \(\frac{2\sqrt{5} + \sqrt{3}}{17}\)