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Simplify Assume That All Exponents Represent Natural Numbers (3y2n+9yn1)(4y2n+3yn9)\left( 3 y ^ { 2 n } + 9 y ^ { n } - 1 \right) - \left( 4 y ^ { 2 n } + 3 y ^ { n } - 9 \right)

question 87

Multiple Choice

Simplify. Assume that all exponents represent natural numbers.
- (3y2n+9yn1) (4y2n+3yn9) \left( 3 y ^ { 2 n } + 9 y ^ { n } - 1 \right) - \left( 4 y ^ { 2 n } + 3 y ^ { n } - 9 \right)

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