Exam-Style Question on Graphs
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 229. This question is typical of the type of question in a GCSE Higher examination. The use of a calculator is allowed.
(a) By completing the square, solve \(x^2+8x+13=0\) giving your answer to three significant figures.
(b) From the completed square you found in part (a) find the minimum value of the curve \(y=x^2+8x+13\).
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If you need more practice try the self-checking interactive exercises called Completing The Square.
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