Distance between two point (x1​,y1​) and (x2​,y2​) is given by,=(x2​−x1​)2+(y2​−y1​)2​ 102=(10−2)2+(y+3)2 (y+3)2=102−82 (y+3)2=62 y+3=±6 ∴y=3 or y=−9