Edexcel F3 2015 June — Question 2

Exam BoardEdexcel
ModuleF3 (Further Pure Mathematics 3)
Year2015
SessionJune
TopicConic sections

2. The hyperbola \(H\) has equation $$\frac { x ^ { 2 } } { a ^ { 2 } } - \frac { y ^ { 2 } } { b ^ { 2 } } = 1$$ where \(a\) and \(b\) are positive constants.
The hyperbola \(H\) has eccentricity \(\frac { \sqrt { 21 } } { 4 }\) and passes through the point (12, 5).
Find
  1. the value of \(a\) and the value of \(b\),
  2. the coordinates of the foci of \(H\).