We simplify the given expression:

$\sqrt{6+6}$

Step 1: Add the terms inside the square root

$6 + 6 = 12$

Step 2: Simplify the square root

$\sqrt{12}$

Step 3: Factorize 12 into perfect squares

$\sqrt{12} = \sqrt{4 \times 3}$

Using the square root property:

$\sqrt{4} \times \sqrt{3} = 2\sqrt{3}$

Final Answer:

$\mathbf{2\sqrt{3}}$

Would you like a more detailed explanation? Let me know if you have any questions!

Here are five related questions to explore further:

1. What is the square root of 18 simplified?
2. How do you simplify $\sqrt{50}$?
3. What is the exact value of $\sqrt{8} + \sqrt{2}$?
4. How do you rationalize $\frac{1}{\sqrt{5}}$?
5. What are the properties of square roots and radicals?

Tip: Always look for perfect square factors when simplifying square roots!