答:x²/4-y²/12=1a²=4,b²=12解得:c²=a²+b²=16解得:a=2,c=4顶点(-2,0),(2,0)焦点(-4,0)、(4,0)椭圆中:a=4,c=2则b²=a²-c²=12椭圆为:x²/16+y²/12=1