O-LevelMathematicsAlgebra and graphs4024/11 · Oct/Nov 2018 · Q53 Marks
Factorise completely 15a + 3ab.
- (a)Factorise completely 15a + 3ab.[1]
- (b)Factorise 6k - xy + 2kx – 3y.[2]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2018). The mark or mark type is shown in brackets.
- 5(a) 3a (5 + b) [1]
- 5(b) (x + 3)(2k - y) [2]
- B1 for one of the partial factorisations: 3(2k-y); x(2k−y); 2k(x + 3); [–]y(x + 3); y(x - 3)
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