1. **Problem:** Simplify $\sqrt{x} \sqrt{x}$.
2. **Formula:** $\sqrt{a} \sqrt{b} = \sqrt{ab}$.
3. **Step:**
$$\sqrt{x} \sqrt{x} = \sqrt{x \cdot x} = \sqrt{x^2}$$
4. **Simplify:**
$$\sqrt{x^2} = x$$
5. **Answer:**
$\boxed{x}$
This is because the square root of a square returns the original value (assuming $x \geq 0$).
Sqrt X Product Cd1812
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