The vertices of the ellipse x249+y216=1\frac{x^2}{49} + \frac{y^2}{16} = 149x2+16y2=1 on the major axis are at:
(±7,0)(\pm 7, 0)(±7,0)
(±4,0)(\pm 4, 0)(±4,0)
(0,±7)(0, \pm 7)(0,±7)
(0,±4)(0, \pm 4)(0,±4)