An ellipse has a center (0,0)(0,0)(0,0) and vertices at (±5,0)(\pm 5, 0)(±5,0) and (0,±2)(0, \pm 2)(0,±2). What is its equation?
x225+y24=1\frac{x^2}{25} + \frac{y^2}{4} = 125x2+4y2=1
x25+y22=1\frac{x^2}{5} + \frac{y^2}{2} = 15x2+2y2=1
x24+y225=1\frac{x^2}{4} + \frac{y^2}{25} = 14x2+25y2=1
x2+y2=25x^2 + y^2 = 25x2+y2=25