Exam-Style Question on Graphs
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 228. This question is similar to one that appeared on a GCSE Higher paper (specimen) for 2017. The use of a calculator is allowed.
(a) Write \(2x^2+8x+27\) in the form \(a(x+b)^2+c\) where \(a\), \(b\), and \(c\) are integers, by 'completing the square'
(b) Hence, or otherwise, find the line of symmetry of the graph of \(y = 2x^2+8x+27\)
(c) Hence, or otherwise, find the turning point of the graph of \(y = 2x^2+8x+27\)
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