Cameroon GCE A-Level Pure Math With Mechanics Practice Questions - Cameroon GCE Advanced Level Pure Mathematics With Mechanics (Subject Code 0765) Exam

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The polynomial $P(x) = 2x^3 + ax^2 + bx - 6$ has $(x - 1)$ as a factor. When $P(x)$ is divided by $(x + 2)$, the remainder is $-36$. Find the value of $a + 2b$.
Correct Answer:
9

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