Mathematics · Oct / Nov 2021 · Paper 22 · Question 23
0580
As printed in the paper
The question as text
Simplify. x xy y x 2 288 3 36 5 60 2 - + - - [4]
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
3 – 5 y or 3 – 5 y final answer 2 ( x –1 2 ) 2 – 24 x [4]
SC3 for answer 3 – 5 y –1 2 x
or B3 for (3y – 5)(x + 12) and 2(x – 12)(x + 12) or (2x – 24)(x + 12)
or B2 for (3y – 5)(x + 12) or 2(x – 12)(x + 12) or (2x – 24)(x + 12) or (2x + 24)(x – 12)
or B1 for 3y(x + 12) – 5(x + 12) or x(3y – 5) + 12(3y – 5) or 2(x2 – 144) or (x – 12)(x + 12)
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