Answer:
x^2 - 3x + 36 units^2
Explanation:
See the attached worksheet.\
Area of a rectangle or square is the Length times the Width.
The area of the large square is found to be x^2 + 2x + 1
The area of the white inner rectangle is 5x - 35
The shaded area may be found by subtracting the white rectangle area from the area of the square, as shown in the attached worksheet.
The area of the shaded portion is x^2 - 3x + 36 units^2