已知双曲线的两个焦点为F 1 (- 10 ,0)、F 2 ( 10 ,0),M是此双曲线上的一点,且满足 M F 1 ? M F 2 =0,| M F 1 |?| M F 2 |=2,则该双曲线的方程是( )
A.
x 2 9 -y 2 =1
B.
x 2 - y 2 9 =1
C.
x 2 3 - y 2 7 =1
D.
x 2 7 - y 2 3 =1
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