(i)[3]
Express $9x^2 - 12x + 5$ in the form $(ax + b)^2 + c$.
(ii)[3]
Decide whether $3x^3 - 6x^2 + 5x - 12$ is increasing, decreasing, or neither.
Mathematics 9709 · AS & A Level · Differentiation
Differentiation — practice question
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Accurate completion of the square giving $(3x - 2)^2 + 1$.” …
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