Find the Area of the Shaded Rectangle $\left( 18 x ^ { 2 } + 30 x + 100 \right) s q$

Multiple Choice

Find the area of the shaded rectangle.
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A) $\left( 18 x ^ { 2 } + 30 x + 100 \right) s q$ in.
B) $\left( 18 x ^ { 2 } + 30 x - 100 \right) s q$ in.
C) $\left( 18 x ^ { 2 } - 30 x - 100 \right)$ sq in.
D) $\left( 18 x ^ { 2 } + 90 x - 100 \right)$ sq in.