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2 marksEquation of a Circle

CSEC Additional Mathematics · 2017 · Paper 2 · Question 3(a)(i)

A circle C has the equation x² + y² + 4x - 2y - 20 = 0.

Express the equation in the form (x + f)² + (y + g)² = r².

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Other parts of this question

  1. 3(a)(ii)State the coordinates of the centre and the value of the radius of circle C.[2 marks]
  2. 3(a)(iii)Determine the points of intersection of circle C and the equation y = 4 - x.[4 marks]
  3. 3(b)(i)Determine the product of the two vectors, p and q.[1 mark]
  4. 3(b)(ii)Determine the angle between the two vectors.[3 marks]

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