Final answer:
To find the area of their garden bed, we need to know the length of one side of the red square. Then, we can simply multiply the length by itself to find the area. The size of their garden bed is x^2.
Step-by-step explanation:
To find the area of their garden bed, we need to know the size of the red square.
If we know the length of one side of the square, we can simply multiply it by itself to find the area.
Let's say the length of one side of the red square is 'x'.
Then, the area of the garden bed is x * x, which can also be written as x^2.
So, the size of their garden bed is x^2.