Subtract the Polynomials $$\left( 4 x ^ { 5 } + 5 x ^ { 4 } - 6 x ^ { 3 } - 9 \right) - \left( 6 x ^ { 5 } + 9 x ^ { 4 } + 9 x ^ { 3 } - 6 \right)$$

Subtract the polynomials. Assume all variable exponents represent whole numbers.
- $$\left( 4 x ^ { 5 } + 5 x ^ { 4 } - 6 x ^ { 3 } - 9 \right) - \left( 6 x ^ { 5 } + 9 x ^ { 4 } + 9 x ^ { 3 } - 6 \right)$$

A) $10 x ^ { 5 } + 14 x ^ { 4 } + 3 x ^ { 3 } - 15$
B) $- 2 x ^ { 5 } - 4 x ^ { 4 } - 15 x ^ { 3 } - 3$
C) $10 x ^ { 5 } + 14 x ^ { 4 } + 3 x ^ { 3 } - 3$
D) $- 2 x ^ { 5 } + 14 x ^ { 4 } + 3 x ^ { 3 } - 15$

Correct Answer:

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