Express the Area of the Shaded Region as a Polynomial $( x + 12 ) ^ { 2 }$

Multiple Choice

Express the area of the shaded region as a polynomial. Factor the polynomial completely.
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A) $( x + 12 ) ^ { 2 }$
B) $( x + 6 ) ( x - 6 )$
C) $( x - 12 ) ^ { 2 }$
D) $( x + 12 ) ( x - 12 )$