Find the area of the shaded region. Write the answer as a polynomial in descending powers of x.
(12x - 9) feet
A. (144x2 - 216x + 81) sq ft
B. (144x2 + 216x - 81) sq ft
C. (144x2 - 216x - 81) sq ft
D. (144x2 + 216x + 81) sq ft
Answer: A
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