Exam-Style Question on Graphs

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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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