Solve
-The Perimeter of a Rectangle Is $\left( 4 x ^ { 2 } + 8 x + 18 \right)$

Multiple Choice

Solve.
-The perimeter of a rectangle is $\left( 4 x ^ { 2 } + 8 x + 18 \right)$ inches and its length is $\left( x ^ { 2 } + 3 x + 6 \right)$ inches. Find its width.

A) $\left( \frac { 8 } { 3 } x + 7 \right)$ in.
B) $\left( x ^ { 2 } + x + 3 \right)$ in.
C) $\left( 2 x ^ { 2 } + 4 x + 9 \right)$ in.
D) $\left( 3 x ^ { 2 } + 5 x + 12 \right)$ in.