X 1 2 2 9 16 July 8, 2019 16 32 64 128 X 1 4 2 9 16 X 2 16 y 2 9 1 X 2 9 y 2 16 1 hyperbola X 2 16 y 2 9 1 ellipse X 1 2 mũ 2 9 16 X 1 3 2 9 16 9 16 x 2 1 2 bolt 9 16 x 2 1 2 casing X 2 16 y 2 9 1 graph 9 16 18 x 2 1 2 wheel bolt