O-LevelAdditional MathematicsFactors of polynomials4037/12 · Oct/Nov 2020 · Q25 Marks
[Figure 2.1] The diagram shows the graph of y = f(x), where f(x) is a cubic polynomial.
- (a)Find f(x).[3]
- (b)Write down the values of x such that f(x) < 0.[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2020). The mark or mark type is shown in brackets.
- B1 for negative soi
- B1 for 1/2 soi
- B1 for (x+5)(x+1)(x-2) or x³ + 4x² -7x-10
- B1 for -5<x<-1
- B1 for x > 2
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