Solve by answering the following questions

I have a question, where I was given a large square with a side length (width) of x m and inside of that square, is a small square with a side length (width) 5 m. The large square part was shaded in the inside. I was then asked to find the area of the large square and the small square, and determine an expression for the area of the shaded part (But no factoring)
How is this done?
After that part I was required to factor the expression and determine an expression for each dimension. Lastly, I was told that if x = 8 m, determine the actual value for each dimension.
Thanks to anyone who can help me with this (: