O-LevelMathematicsAlgebra and graphs4024/12 · May/June 2019 · Q133 Marks
Expand and simplify (x - 3)².
- (a)Expand and simplify (x - 3)².[1]
- (b)Factorise 18 - 6y + 5xy - 15x.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.
- [1] (a) x² - 6x + 9 final answer
- [2] (b) (5x - 6)(y - 3) final answer
- [2] or (6 – 5x)(3 – y) final answer
- [B1] for one correct partial factorisation seen
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