Answer:
400x^2-16x^2pi
Explanation:
To first start off, we need to find the area of the circle mirror. This is 16x^2pi.
Now, we need to find the area of the square, which results in 400x^2.
From here, we can subtract the circle from the square.
Because you cant subtract pi, we can leave it as it is.
Hope this helped you!