Solve the Square Root Equation: Finding X in √x = 2²

To solve this problem, we'll follow these steps:

• Step 1: Simplify the given power.
• Step 2: Set up the equation using what we know about square roots.
• Step 3: Solve for $x$ using appropriate calculations.

Now, let's work through each step:
Step 1: Simplify $2^2$. We calculate $2^2 = 4$.
Step 2: Set up the equation: $\sqrt{x} = 4$.
Step 3: Square both sides to solve for $x$.
$x = 4^2 = 16$

Therefore, $\boxed{16}$ is the solution to the problem, which matches with choice 2.