Use a Special Product Pattern to Find the Product $( x + 9 ) ( x - 9 )$

Multiple Choice

Use a special product pattern to find the product $( x + 9 ) ( x - 9 )$ .

A) $x ^ { 2 } - 18 x + 81$
B) $x ^ { 2 } - 81$
C) $x ^ { 2 } + 81$
D) $x ^ { 2 } + 18 x + 81$
E) $x ^ { 2 } - 18$