Mathematics 9709 · AS & A Level · Algebra

Algebra — practice question

(i)[5]

The polynomial $x^3 + ax^2 + bx + 8$, with $a$ and $b$ as constants, is called $p(x)$. It is stated that the remainder on dividing $p(x)$ by $(x - 3)$ is $14$, and that the remainder on dividing $p(x)$ by $(x + 2)$ is $24$. Determine the values of $a$ and $b$.

(ii)[4]

With these values of $a$ and $b$, determine the quotient when $p(x)$ is divided by $x^2 + 2x - 8$ and hence solve the equation $p(x) = 0$.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: Substituting $x=3$ gives $9a+3b+35=14$

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