Multiply Using the Rule for the Product of the Sum $$( x - 3 ) ( x + 3 ) \left( x ^ { 2 } + 9 \right)$$

Multiply using the rule for the product of the sum and difference of two terms. Assume any variable exponents represent whole numbers.
- $$( x - 3 ) ( x + 3 ) \left( x ^ { 2 } + 9 \right)$$

A) $x ^ { 4 } + 18 x ^ { 2 } + 81$
B) $x ^ { 4 } - 81$
C) $x ^ { 4 } + 6 x ^ { 3 } + 18 x ^ { 2 } - 54 x - 81$
D) $x ^ { 4 } + 6 x ^ { 3 } - 54 x - 81$

Correct Answer:

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