AQA C1 2012 January — Question 2

Exam BoardAQA
ModuleC1 (Core Mathematics 1)
Year2012
SessionJanuary
TopicQuadratic Functions

2
  1. Factorise \(x ^ { 2 } - 4 x - 12\).
  2. Sketch the graph with equation \(y = x ^ { 2 } - 4 x - 12\), stating the values where the curve crosses the coordinate axes.
    1. Express \(x ^ { 2 } - 4 x - 12\) in the form \(( x - p ) ^ { 2 } - q\), where \(p\) and \(q\) are positive integers.
    2. Hence find the minimum value of \(x ^ { 2 } - 4 x - 12\).
  3. The curve with equation \(y = x ^ { 2 } - 4 x - 12\) is translated by the vector \(\left[ \begin{array} { r } - 3
    2 \end{array} \right]\). Find an equation of the new curve. You need not simplify your answer.