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Mathematics, 30.01.2020 16:50 poop2351

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

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