What is the product? open paren 3 A squared b to the 7th power close paren times open paren 5 A cubed b to the 8th power close paren

Multiply the coefficients: 3 × 5 = 15. For matching bases, add the exponents: A² × A³ = A⁵ and b⁷ × b⁸ = b¹⁵, so the product is 15A⁵b¹⁵, choice A.

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