Multiply Assume That Variables Used as Exponents Represent Positive Integers $$\left( \mathrm { x } ^ { \mathrm { a } } + 7 \right) \left( \mathrm { x } ^ { 2 \mathrm { a } } - 9 \right)$$

question 305

Multiple Choice

Multiply. Assume that variables used as exponents represent positive integers.
- $$\left( \mathrm { x } ^ { \mathrm { a } } + 7 \right) \left( \mathrm { x } ^ { 2 \mathrm { a } } - 9 \right)$$

• A) \(x ^ { 3 a } - 2 x ^ { a } - 63\)
• B) \(x ^ { 2 a ^ { 2 } + 7 x ^ { 2 a } - 9 x ^ { a } - 63 }\)
• C) \(x ^ { 3 a } - 2 x ^ { 2 a } - 63\)
• D) \(x ^ { 3 a } + 7 x ^ { 2 a } - 9 x ^ { a } - 63\)

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