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10 June, 16:16

He product of a + 3 and - 2a2 + 15a + 6 is - 2a3 + xa2 + 51a + 18. What is the value of x?

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  1. 10 June, 16:19
    0
    9

    Step-by-step explanation:

    The contributors to the a² term in the product are ...

    ... 3 * (-2a²) + a (15a) = a² (-6+15) = 9a²
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