Final answer:
The polynomial that gives the area of the square is option A) 40 + 12a + 9.
Step-by-step explanation:
The polynomial that gives the area of the square is option A) 40 + 12a + 9.
To find the area of a square, we need to square the length of one of its sides. In this case, the length of the side is given by the expression (2a + 3a). Simplifying, we get 5a. Squaring this expression, we get 25a^2. Therefore, the area of the square is 25a^2.
Option A) 40 + 12a + 9 does not represent the area of the square.