The image contains a question regarding geometry, specifically involving the properties of circles and triangles. The question (14) seems to state that:

• $AB = 6 \, \text{cm}$
• $BC = 3 \, \text{cm}$
• $AD = 4 \, \text{cm}$

Then it asks for the length of $ED$, related to two circles touching internally at $A$, with some additional complex algebra involving complex numbers.

To proceed with finding $ED$, we need to first extract key relationships from the image, but more context is required for the geometric reasoning. Could you clarify or describe any specific formula or approach used here?

Do you need more details or an explanation on how to solve this kind of problem? Let me know how I can assist further!

Here are some related questions to expand on this topic:

1. How does the power of a point theorem relate to this geometry?
2. What is the method for solving for unknown lengths when two circles touch internally?
3. Can we use the Pythagorean theorem in any of the triangles in this diagram?
4. How would complex numbers (like $2 + 3i$) influence the geometric approach in this case?
5. What are the key properties of tangents to circles and their distances from the center?

Tip: To solve such problems efficiently, focus on identifying similar triangles and utilizing theorems about tangents and circle geometry.