椭圆:裤咐x^2/9+y^2/4=1,所以a=3.b=2。则焦点为(√5,0)(-√5,0)。设双曲线x^2/m^2-y^2/(5-m^2)=1.代入点,9/m^2-4/(5-m^2)=1,得m^4-18m^2+45=0,(m^2-3)(m^2-15)=0,所胡袜纯以m^2=3,所以x^2/3-y^2/好携2=1