Question 420415


  Given a=8 and 2c=6-> c=3 We know that b^2=a^2-c^2=64-9=55, thus b=+/-sqrt(55)

  The equation of the ellipse is: {{{(x^2/64)+(y^2/55)=1 }}}

  {{{drawing(600, 600, -10, 10, -8, 8, grid(1), ellipse(0, 0, 16, 15 ))}}}