Solve the Square Root Equation: sqrt(x) = 20

To solve this problem, follow these steps:

• Step 1: Begin with the given equation:

$\sqrt{x} = 20$

• Step 2: Square both sides of the equation to eliminate the square root. When you square a square root, you are left with the number inside the square root:

$(\sqrt{x})^2 = 20^2$

• Step 3: Simplify both sides of the equation:

$x = 400$

Therefore, the solution to the problem is $x = 400$.

The correct choice from the provided options is 400.