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Verified answer
(-2a² - 3a)(5a² + 4a - 2)= (-2a²)(5a²) + (-2a²)(4a) + (-2a²)(-2) + (-3a)(5a²) + (-3a)(4a) + (-3a)(-2)
= -10a⁴ - 8a³ + 4a² - 15a³ - 12a² + 6a
= -10a⁴ - 8a³ - 15a³ + 4a² - 12a² + 6a
= -10a⁴ - 23a³ - 8a² + 6a