5m Zen
X2 9 y2 25
X2 9 y2 25 pictures 5
Home
X2 9 y2 25
x2/25+y2/9u003d1 ellipse
cho elip x2 25 y2 9 1
25 4 x2 y2 9
factorise x2 9 y2 25
x2 9 y2 25
x2 9 y2 25 1
