2025 DSS PRELIMS P1 Q13

2025 DSS PRELIMS P1 Q13

Secondary 4
3 marks
  1. Express \(7-10x+x^2\) in the form \((x+a)^2+b\).[2]
  2. Write down the equation of the line of symmetry of the graph of \(y=7-10x+x^2\).[1]

Solution:

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Answer:(a) \((x-5)^2-18\) (b) \(x=5\)

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