Answer:
8a^5 - 28a^4 + 2a^3 +29a^2 + 6a - 9
Explanation:
(4a3-5a-3) × (2a2-7a+3)
= 4a^3 × 2a^2 + 4a^3(-7a) + 4a^3 × 3 - 5a × 2a^2 - 5a(-7a) - 5a × 3 - 3 × 2a^2 - 3(-7a) - 3 × 3
= 8a^5 - 28a^4 + 2a^3 +29a^2 + 6a - 9
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