Mathematics · May / June 2020 · Paper 22 · Question 25
0580
As printed in the paper
The question as text
Simplify. ax a bx b x x 3 2 6 2 15 2 + - - + - [5]
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
2 x − 5 final answer − a 2 b [5]
B2 for (2x – 5)(x + 3)
or B1 for (2x + p)(x + q) where pq = –15 or p + 2q = 1
B2 for (x + 3)(a – 2b)
or B1 for x(a – 2b) + 3(a – 2b) or a(x + 3) – 2b(x + 3)
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