The problem is to solve the equation $\sqrt{x-D} = \frac{A^2}{A}$ for $x$.

1. Problem Description

The problem is to solve the equation $\sqrt{x-D} = \frac{A^2}{A}$ for $x$.

2. Solution Steps

First, simplify the right side of the equation:

$$\frac{A^2}{A} = A$$

Now the equation becomes:

$$\sqrt{x-D} = A$$

Square both sides of the equation to eliminate the square root:

$$(\sqrt{x-D})^2 = A^2$$

$$x-D = A^2$$

Add $D$ to both sides of the equation to isolate $x$:

$$x = A^2 + D$$

3. Final Answer

$x = A^2 + D$