Mathematics · Oct / Nov 2024 · Paper 42 · Question 9
0580
As printed in the paper
The question as text
( )x x 2 5 f Â Ä ( )x x x 2 g 2  Ä
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Show the answer and mark scheme
9(a)(i)[1]
9 [1]
9(a)(ii)[1]
63 [1]
FT (their (a)(i))2 – 2 × their (a)(i)
9(a)(iii)[2]
x + 5 oe final answer 2 [2]
M1 for x = 2y – 5 or y + 5 = 2x or y = x – 5 2 2
9(b)[4]
x2 – 18x + 35 final answer [4]
M1 for (2x – 5)2 – 2(2x – 5) – 3(x2 – 2x)
B1 for 4x2 – 10x – 10x + 25
B1 for – 4x + 10 – 3x2 + 6x
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