Mathematics, 19.10.2019 20:30, kiingbr335yoqzaxs

Eproduct of a + 3 and –2a2 + 15a + 6 is –2a3 + xa2 + 51a + 18. what is the value of x?
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Eproduct of a + 3 and –2a2 + 15a + 6 is –2a3 + xa2 + 51a + 18. what is the value of x?
3