Task: Question Answering
Input (English): Problem: the area of one square is x ^ 2 + 6 x + 9 and the area of another square is 4 x ^ 2 − 28 x + 49. if the sum of the perimeters of both squares is 56, what is the value of x ?
Options: a. 3, b. 4, c. 5, d. 6, e. 7
Output (English): d