1. **State the problem:** Simplify or understand the expression $x^2$. 2. **Formula and rules:** The expression $x^2$ means $x$ multiplied by itself: $$x^2 = x \times x$$ 3. **Explanation:** This is called "x squared" and represents the area of a square with side length $x$. 4. **Intermediate work:** There is no further simplification unless a value for $x$ is given. 5. **Final answer:** The expression $x^2$ is already in its simplest form.