What is the area enclosed by the graphs of (y - x)^2 = 4 and (y + x)^2 = 4?
This solution can be easily found graphically : https://www.desmos.com/calculator/8tv2ssgvrv
The area = two triangles each with a base of 4 and a height of 2
So.....the area = 2 [ (1/2) (4) (2) ] = 8 units^2
