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15 March, 11:01

The product of a + 3 and - 2a2 + 15a + 6 is - 2a3 + xa2 + 51a + 18. Find the value of x? a. 3 b. 9 c. 12 d. 15

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  1. 15 March, 11:09
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    (a + 3) (-2a^2 + 15a + 6) = - 2a^3 + 15a^2 + 6a - 6a^2 + 45a + 18 = - 2a^3 + 9a^2 + 51a + 18

    Therefore, the value of x is 9.
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