4x^2+9y^2=36, x^2/9+y^2/4=1, 则有,a=3,b=2. c=√a^2-b^2=√5. 则椭圆的焦点坐标为F1,(-√5,0),F2(√5,0). 设,双曲线的方程为: x^2/a^2-y^2/b^2=1,(a>b>0). 点,(3,-2)在双曲线上,有 9/a^2-4/b^2=1, 而,c^2=a^2+b^2,...