Phương trình chính tắc của elip có  hai đỉnh là $A(5;0)$  và $B(0;3)$ là:

Elip

Hypebol

Parabol

A.Elip

B.Parabol

C.Hypebol

${c^2} = {a^2} + {b^2}$.    

${b^2} = {a^2} + {c^2}$.

${a^2} = {b^2} + {c^2}$.

$c = a + b$ .

${A_1}\left( { - 16;0} \right);\,\,{A_2}\left( {16;0} \right);\,\,{B_1}\left( {0; - 9} \right);\,\,{B_2}\left( {0;9} \right)$

${A_1}\left( { - 4;0} \right);\,\,{A_2}\left( {4;0} \right);\,\,{B_1}\left( {0; - 3} \right);\,\,{B_2}\left( {0;3} \right)$

${A_1}\left( { - 4;0} \right);\,\,{A_2}\left( {4;0} \right);\,\,{B_1}\left( {0; - 9} \right);\,\,{B_2}\left( {0;9} \right)$           

${A_1}\left( { - 16;0} \right);\,\,{A_2}\left( {16;0} \right);\,\,{B_1}\left( {0; - 3} \right);\,\,{B_2}\left( {0;3} \right)$

F(2; 0)

F(0; 2)

F(0; -2)

F(-2; 0)