Answer: he area of the entire rectangle is the sum of the areas of the four rectangles.
Area of the top left rectangle: x * x = x^2
Area of the top right rectangle: x * 9 = 9x
Area of the bottom left rectangle: 2 * x = 2x
Area of the bottom right rectangle: 2 * 9 = 18
Total area: x^2 + 9x + 2x + 18
Simplifying and arranging in standard form:
Area = x^2 + 11x + 18
Explanation: