Mathematics 9709 · AS & A Level · Algebra

Algebra — practice question

The polynomial $p(x)$ has the form $p(x) = 5x^3 + ax^2 + bx - 16$, with $a$ and $b$ as constants. It is known that $(x - 2)$ divides $p(x)$ exactly and that the remainder is $27$ when $p(x)$ is divided by $(x + 1)$.
(i)[5]

Find the values for $a$ and $b$.

(ii)[3]

Hence factorise $p(x)$ fully.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: Substitute $x=2$ and set the expression equal to zero

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI