The expression "căn x = 3" represents the equation \( \sqrt{x} = 3 \), where "căn" translates to "square root."

To solve for \(x\), we can square both sides of the equation:

\[
\left(\sqrt{x}\right)^2 = 3^2
\]

This simplifies to:

\[
x = 9
\]

So, the solution is \( x = 9 \).

Would you like more details or have any questions? 

Here are 5 related questions you might find interesting:
1. How do you solve \( \sqrt{x} = 5 \)?
2. What happens if \( \sqrt{x} = -3 \)?
3. How do you solve equations involving cube roots?
4. What is the general method to solve \( \sqrt{ax + b} = c \)?
5. How do you solve equations like \( x^2 = 16 \)?

**Tip:** When solving square root equations, always remember to check if the solution makes sense in the context of the problem (e.g., square roots are non-negative).

Learn how to solve the square root equation \( \sqrt{x} = 3 \) with a step-by-step explanation. This problem covers important algebraic concepts and explains how to square both sides to find the solution. Perfect for students in Grades 6-8.

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