Express the Area of the Figure as a Polynomial in Descending

Multiple Choice

Express the area of the figure as a polynomial in descending powers of the variable $x$ .
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A) $x^{2}+3 x+3$
B) $x^{2}+3 x+9$
C) $x^{2}-6 x+9$
D) $x^{2}+6 x+9$