$\"\"$

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Since base is common, apply the product of powers property: a^m · aⁿ = a^m⁺ⁿ.

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b⁹ · b² = b^{9 + 2}

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= b¹¹(Add exponents: 9 + 2 = 11) $\"\"$

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Product of b⁹ · b² is b¹¹.

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