Edexcel Mathematics Higher Tier, November 2009 (1380/4H) (Paper 4, calculator)


Question 17 a)


x y


-2


note 1 9


-1 3


0 -1 1 -3 2


note 2 -3


note 1: (-2)2 – (3 x -2) – 1 = 4 - - 6 – 1 = 4 + 6 – 1 = 9 note 2: (2)2 – (3 x 2) – 1 = 4 – 6 – 1 = -3 note 3: (4)2 – (3 x 4) – 1 = 16 – 12 – 1 = 3


b) 3 -1 4


note 3 3


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