+235 If you put A and B on a graph, you can easily see that they are 4 units apart. Let's call the length of CB and/or DA x. Using the area formula for a rectangle, we have 4 * x = 20. Divide both sides by 4, and we get x = 5. So the points need to be at (-3, -2) and (1, -2). You can also do this by figuring out x, then subtracting x from the y coordinates.
Hope this helps!
