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Q18: Question – Paper 5 – November 2018
Q18: Question – Paper 5 – November 2018
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Question
18 a)
i) Write x^{2} + 4x – 16 in the form (x + a)^{2} – b
[3 marks]
ii) Solve the equation x^{2} + 4x – 16 = 0
Give your answers in surd form as simply as possible.
x = ................... or x = .....................
[4 marks]
b) Sketch the graph of y = x^{2} + 4x – 16, showing clearly the coordinates of any turning points.
[3 marks]