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Completing the Square

Completing the Square

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Question 66
a.

Write 5x2−20x−155x^2 - 20x - 155x2−20x−15 in the form a(x+b)2+ca(x + b)^2 + ca(x+b)2+c where aaa, bbb, and c c\,c are integers.

[3]
b.

Hence, or otherwise, write down the coordinates of the turning point of the graph of y=5x2−20x−15y = 5x^2 - 20x - 15y=5x2−20x−15

[1]
Markscheme

Completing the Square Questions

  1. GCSE
  2. /Maths
  3. /Completing the Square

250 exam-style questions on OCR GCSE Maths Completing the Square. Each one has a worked solution and a mark scheme showing where the marks go.

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