Database - Quadratic Equation

• Ahm97sic

  2 Mar 10, 22:23

  For "O" level add maths students to practise,

  Question

  Suppose that a and b are the roots of x^2 + x sin y + 1 = 0 while

  c and d are the roots of the equation x^2 + x cos y - 1 = 0. Find the

                  1         1          1        1      

  value of ------- + ------ + ------ + ------

               a^2       b^2      c^2      d^2