Find the Area of the Shaded Square $\left( 121 x ^ { 2 } - 198 x + 81 \right) s q f t$

Multiple Choice

Find the area of the shaded square.
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A) $\left( 121 x ^ { 2 } - 198 x + 81 \right) s q f t$
B) $\left( 121 x ^ { 2 } - 198 x - 81 \right) s q f t$
C) $\left( 121 x ^ { 2 } + 198 x - 81 \right) s q f t$
D) $\left( 121 x ^ { 2 } + 198 x + 81 \right) s q f t$