Equation of locus of all points such that the different surface distance from (- 3, - 7) and (-3, 3) is 8 units is_____
O (x+3)²/16 - (y+2)²/9 =1
O (x+3)²/9 - (y+2)²/16 =-1
O (x+3)²/9 - (y+2)²/19 =1
O (x+3)²/7 - (y+2)²/19 =-1