焦点坐标为(2,0),(-2,0)因为2+2=4,根号4等于2,所以焦点为(2,0),(-2,0)焦点在x轴上..
x^2-y^2=2x^2/2-y^2/2=1a^2=b^2=2c^2=a^2+b^2=4c=2故焦点坐标是(-2,0)和(2,0)
(2,0)和(-2,0)