Find the product.(a2)(2a3)(a2 – 8a + 9)

First multiply the monomial factors: a² · 2a³ = 2a⁵, since the exponents of the same base add. Then distribute 2a⁵ across the trinomial: 2a⁵(a² − 8a + 9) = 2a⁷ − 16a⁶ + 18a⁵, which matches choice A.

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