$\"\"$

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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 · b⁶ = b^{9 + 6}

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= b¹⁵(Add exponents: 9 + 6 = 15) $\"\"$

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The product of b⁹ · b⁶ is b¹⁵.

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