(2 - a ) + ( y - h ) - z ? 5 In this question you must show all stages of your working. Solutions relying on calculator technology are not acceptable. (a) By letting p = 2*, show that the equation 2 x 4* + 2* + 3 = 1 + 2* - 2 can be rewritten in the form 8p2 + 31p - 4=0 (3) (b) Hence solve 2 x 4* + 2*+ 3 = 1+ 2x - 2 (3) (Total for Question 5 is 6 marks) 6. The points P, Q and R have coordinates (-5, -5), (7, 1) and (9, -3) respectively. (a) Show that angle POR = 90 (3) Given that P, Q and R each lie on a circle C (b) find an equation for C (3) (Total for Question 6 is 6 marks)