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​Q18: Question – Paper 5 – November 2018
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Question

18 a)

i) Write x2 + 4x – 16 in the form (x + a)2 – b

[3 marks]
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ii) Solve the equation x2 + 4x – 16 = 0

Give your answers in surd form as simply as possible.


x = ................... or x = .....................
[4 marks]
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b) Sketch the graph of y = x2 + 4x – 16, showing clearly the coordinates of any turning points.

[3 marks]