Use the Area Model to Write the Simplified Expression for the Total

Multiple Choice

Use the area model to write the simplified expression for the total area below.

A) $x ^ { 2 } + 3 x$
B) $x ^ { 2 } + 9$
C) $x ^ { 2 } + 9 x$
D) $x ^ { 2 } + 6 x + 9$
E) $x ^ { 2 } + 3 x + 9$